{ "metadata": { "title": "MLB Ballpark History — Research Expansion", "as_of": "2026-10-08", "revision": 3, "revision_note": "Astros sources repaired; selected-home intervals preserved; overlapping primary stays explicitly annotated; unused lifecycle fields removed; precision flags and scoring hold added.", "scope": "Current 30 franchises: principal AL/NL and relevant AA franchise homes, selected temporary homes, and Braves NA context. Not every park in all historically recognized major leagues.", "coordinate_policy": "WGS84 published venue/site points, not surveyed home plate. Historic adjacent sites and rebuilds require footprint review.", "readiness": "Exploratory map only. Proposed coordinates are display candidates, not approved scoring targets.", "credits": "Firecrawl status returned creditsUsed=0; this is not a reliable billing total and no usage claim is made.", "map_build": "2026-10-26", "provenance": { "base_sha256": "adaa46cbd6b21d6d32e9715a2d851f6f8e192c399e6fbd6499fd74fb0a302de8", "corrections_applied": 9, "inputs_preserved": true }, "new_york_pilot_ids": [ "ny-yankee-stadium-1923", "ny-yankee-stadium-2009", "ny-shea-stadium", "queens-citi-field", "ny-polo-grounds-i", "ny-polo-grounds-ii", "ny-polo-grounds-final", "brooklyn-ebbets-field" ] }, "venues": [ { "venue_id": "phl-recreation-park", "name": "Recreation Park", "city": "Philadelphia", "state_or_province": "Pennsylvania", "country": "United States", "aliases": [ "Centennial Base Ball Grounds (1875–1883)", "Centennial Park", "Columbia Park", "Columbia Park (1866–1875)", "League Grounds (1884–1886)" ], "opened_year": null, "latitude": 39.98092, "longitude": -75.17424, "coordinate_confidence": "unresolved", "site_note": "Early Philadelphia ground; exact later aliases and physical-site chronology are not separately established in the evidence.", "sources": [ "https://en.wikipedia.org/wiki/Recreation_Park_(Philadelphia)", "https://www.mlb.com/phillies/history/ballparks", "https://www.phl.org/at-phl/art-exhibitions/art-exhibitions-archives/node/399" ], "uncertainties": [ "No exact published coordinates located in the cited sources.", "Exact demolition year was not established from the fetched sources; coordinates rely on Wikipedia provenance." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "carried from sourced pilot; not re-fetched in this pass", "coordinate_source": "https://en.wikipedia.org/wiki/Recreation_Park_(Philadelphia)", "site_id": "phl-recreation-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1886, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 39.98092, "longitude": -75.17424, "source": "https://en.wikipedia.org/wiki/Recreation_Park_(Philadelphia)" }, "map_point": { "latitude": 39.98092, "longitude": -75.17424, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Recreation_Park_(Philadelphia)" } }, { "venue_id": "phl-upenn-grounds", "name": "University of Pennsylvania grounds", "city": "Philadelphia", "state_or_province": "Pennsylvania", "country": "United States", "aliases": [ "Penn Athletic Grounds", "University of Pennsylvania", "University of Pennsylvania Grounds" ], "opened_year": null, "latitude": null, "longitude": null, "coordinate_confidence": "unresolved", "site_note": "Listed by the Phillies as a 1894 ballpark and treated as an alternate home.", "sources": [ "https://www.mlb.com/phillies/history/ballparks" ], "uncertainties": [ "Opening and construction dates are not supplied.", "The fetched MLB page does not provide exact location, opening/demolition dates, coordinates, or current site use." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "carried from sourced pilot; not re-fetched in this pass", "coordinate_source": null, "site_id": "phl-upenn-grounds", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1894, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "phl-baker-bowl", "name": "Baker Bowl / National League Park", "city": "Philadelphia", "state_or_province": "Pennsylvania", "country": "United States", "aliases": [ "Baker Bowl", "National League Park", "Philadelphia Base Ball Park", "Philadelphia Baseball Grounds" ], "opened_year": 1887, "latitude": 39.99306, "longitude": -75.15583, "coordinate_source": "https://en.wikipedia.org/wiki/Baker_Bowl", "coordinate_confidence": "published", "site_note": "Phillies home from 1887 through 1938; rebuilt in 1895 and razed in 1950.", "sources": [ "https://en.wikipedia.org/wiki/Baker_Bowl", "https://explorepahistory.com/hmarker.php%3FmarkerId=1-A-1.html", "https://sabr.org/journal/article/baker-bowl/", "https://sabr.org/journal/article/columbia-park-ii-philadelphia-american-league-1901-08/", "https://www.mlb.com/phillies/history/ballparks" ], "uncertainties": [ "No fetched source supplied coordinates or a definite post-demolition current land use. The 1887–1894 naming sequence and exact 1927 game count were not normalized beyond what the sources state." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "carried from sourced pilot; not re-fetched in this pass", "site_id": "phl-baker-bowl", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1938, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 39.99306, "longitude": -75.15583, "source": "https://en.wikipedia.org/wiki/Baker_Bowl" }, "map_point": { "latitude": 39.99306, "longitude": -75.15583, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Baker_Bowl" } }, { "venue_id": "phl-columbia-park", "name": "Columbia Park", "city": "Philadelphia", "state_or_province": "Pennsylvania", "country": "United States", "aliases": [ "Columbia Park", "Columbia Park (Philadelphia Athletics)", "Columbia Park II", "Philadelphia American League Ball Park" ], "opened_year": 1901, "latitude": 39.98111, "longitude": -75.18278, "coordinate_confidence": "unresolved", "site_note": "The Phillies' official history lists Columbia Park for 1903; this is distinct from the Athletics' Columbia Park usage.", "sources": [ "https://baseballhall.org/discover/shortstops/a-map-of-columbia-park", "https://en.wikipedia.org/wiki/Columbia_Park", "https://sabr.org/journal/article/columbia-park-ii-philadelphia-american-league-1901-08/", "https://www.mlb.com/athletics/history/ballpark", "https://www.mlb.com/phillies/history/ballparks" ], "uncertainties": [ "Opening and demolition years are not supplied.", "A demolition year and coordinates were not supplied by the fetched preferred sources; the site-current-use account is historical rather than a current municipal parcel record." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "carried from sourced pilot; not re-fetched in this pass", "coordinate_source": "https://en.wikipedia.org/wiki/Columbia_Park", "site_id": "phl-columbia-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1908, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 39.98111, "longitude": -75.18278, "source": "https://en.wikipedia.org/wiki/Columbia_Park" }, "map_point": { "latitude": 39.98111, "longitude": -75.18278, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Columbia_Park" } }, { "venue_id": "phl-shibe-park", "name": "Shibe Park / Connie Mack Stadium", "city": "Philadelphia", "state_or_province": "Pennsylvania", "country": "United States", "aliases": [ "Connie Mack Stadium", "Shibe Park", "Shibe Park / Connie Mack Stadium" ], "opened_year": 1909, "latitude": 39.9957135, "longitude": -75.1648996, "coordinate_confidence": "unresolved", "site_note": "Phillies tenancy began in 1938; renamed Connie Mack Stadium in 1953.", "sources": [ "https://en.wikipedia.org/wiki/Shibe_Park", "https://explorepahistory.com/hmarker.php%3FmarkerId=1-A-16.html", "https://www.hmdb.org/m.asp?m=18387", "https://www.mlb.com/athletics/history/ballpark", "https://www.mlb.com/phillies/history/ballparks" ], "uncertainties": [ "No exact published coordinates in the cited evidence.", "Current post-demolition land use was not stated in the fetched official/marker sources; coordinate is the marker location and may not be the exact former home-plate or stadium centroid." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "carried from sourced pilot; not re-fetched in this pass", "coordinate_source": null, "site_id": "phl-shibe-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1970, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 7, "longitude": 7 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 39.9957135, "longitude": -75.1648996, "source": null }, "map_point": { "latitude": 39.9957135, "longitude": -75.1648996, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "phl-veterans-stadium", "name": "Veterans Stadium", "city": "Philadelphia", "state_or_province": "Pennsylvania", "country": "United States", "aliases": [ "The Vet" ], "opened_year": 1971, "latitude": 39.90667, "longitude": -75.17111, "coordinate_confidence": "unresolved", "site_note": "Multi-purpose stadium and Phillies home through the 2003 season.", "sources": [ "https://en.wikipedia.org/wiki/Veterans_Stadium", "https://pabook.libraries.psu.edu/literary-cultural-heritage-map-pa/feature-articles/vet-gone-not-forgotten", "https://www.mlb.com/phillies/history/ballparks" ], "uncertainties": [ "Demolition year is not stated in the cited workspace evidence.", "Exact coordinates and a more precise parcel/address were not established from fetched sources." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "carried from sourced pilot; not re-fetched in this pass", "coordinate_source": "https://en.wikipedia.org/wiki/Veterans_Stadium", "site_id": "phl-veterans-stadium", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 2003, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 39.90667, "longitude": -75.17111, "source": "https://en.wikipedia.org/wiki/Veterans_Stadium" }, "map_point": { "latitude": 39.90667, "longitude": -75.17111, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Veterans_Stadium" } }, { "venue_id": "phl-citizens-bank-park", "name": "Citizens Bank Park", "city": "Philadelphia", "state_or_province": "Pennsylvania", "country": "United States", "aliases": [], "opened_year": 2004, "latitude": 39.90583, "longitude": -75.16639, "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "Opened April 12, 2004 and remains the Phillies' main home through 2026.", "sources": [ "https://en.wikipedia.org/wiki/Citizens_Bank_Park", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest", "https://www.mlb.com/phillies/ballpark", "https://www.mlb.com/phillies/ballpark/information/facts-figures-fun-features", "https://www.mlb.com/phillies/history/ballparks" ], "uncertainties": [ "No exact published coordinates in the cited evidence.", "Coordinates were not supplied by the fetched official pages." ], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "coordinate_source": "https://en.wikipedia.org/wiki/Citizens_Bank_Park", "site_id": "phl-citizens-bank-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 39.90583, "longitude": -75.16639, "source": "https://en.wikipedia.org/wiki/Citizens_Bank_Park" }, "map_point": { "latitude": 39.90559, "longitude": -75.166625, "target_type": "dirt-circle centre", "status": "Proposed imagery point · not approved for scoring", "sources": [ "https://en.wikipedia.org/wiki/Citizens_Bank_Park", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "uncertainty_m": 10, "uncertainty_status": "Analyst estimate, not measured accuracy", "basis": "Esri imagery: home dirt circle identified" }, "coordinate_audit": { "franchise": "PHI", "venue_id": "phl-citizens-bank-park", "park_name": "Citizens Bank Park", "city": "Philadelphia", "original_latitude": 39.90583, "original_longitude": -75.16639, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": 39.90559, "proposed_longitude": -75.166625, "proposed_target_type": "home plate", "displacement_m": 33.3, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Esri imagery: home dirt circle identified", "estimated_uncertainty_m": 10, "confidence": "medium-high", "source_urls": [ "https://en.wikipedia.org/wiki/Citizens_Bank_Park", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "review_status": "proposed - imagery-read home plate, not surveyed, not approved for scoring", "notes": "" }, "current_franchise": "PHI" }, { "venue_id": "cin-bank-street-grounds", "name": "Bank Street Grounds", "city": "Cincinnati", "state_or_province": "Ohio", "country": "United States", "aliases": [], "opened_year": null, "latitude": null, "longitude": null, "coordinate_confidence": "unresolved", "site_note": "Located on the north side of Bank Street, south of Western Avenue and west of McLean Avenue.", "sources": [ "https://www.mlb.com/reds/history/ballparks" ], "uncertainties": [ "The 1880 club and later Red Stockings organizational continuity are distinguished in the workspace evidence; exact coordinates are unresolved." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": null, "longitude": null, "source": null }, "site_id": "cin-bank-street-grounds", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1883, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "cin-league-park", "name": "League Park", "city": "Cincinnati", "state_or_province": "Ohio", "country": "United States", "aliases": [ "American Park" ], "opened_year": null, "latitude": null, "longitude": null, "coordinate_confidence": "unresolved", "site_note": "Originally American Park; renamed League Park. Palace of the Fans was built at this physical location.", "sources": [ "https://ballparkdigest.com/2019/04/02/cincinnati-reds-ballparks-150-years-of-history/", "https://www.mlb.com/reds/history/ballparks" ], "uncertainties": [ "Exact coordinates and demolition year are unresolved.", "Successive facilities at the same broad grounds; do not count overlapping historical pins as independent geography challenges." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "site_id": "cincinnati-findlay-western", "proposed_coordinates_unverified": { "latitude": null, "longitude": null, "source": null }, "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1901, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "cin-palace-of-the-fans", "name": "Palace of the Fans", "city": "Cincinnati", "state_or_province": "Ohio", "country": "United States", "aliases": [], "opened_year": null, "latitude": null, "longitude": null, "coordinate_confidence": "unresolved", "site_note": "Rebuilt grandstand/facility at the League Park physical location after a major fire.", "sources": [ "https://ballparkdigest.com/2019/04/02/cincinnati-reds-ballparks-150-years-of-history/", "https://www.mlb.com/reds/history/ballparks" ], "uncertainties": [ "Exact coordinates and demolition year are unresolved.", "Successive facilities at the same broad grounds; do not count overlapping historical pins as independent geography challenges." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "site_id": "cincinnati-findlay-western", "proposed_coordinates_unverified": { "latitude": null, "longitude": null, "source": null }, "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1911, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "cin-crosley-field", "name": "Crosley Field", "city": "Cincinnati", "state_or_province": "Ohio", "country": "United States", "aliases": [ "Redland Field" ], "opened_year": 1912, "latitude": 39.11667, "longitude": -84.53528, "coordinate_confidence": "published stadium/site point; footprint not surveyed", "site_note": "Originally named Redland Field and renamed in 1934.", "sources": [ "https://en.wikipedia.org/wiki/Crosley_Field", "https://www.mlb.com/reds/history/ballparks" ], "uncertainties": [ "Demolition year and exact coordinates are unresolved.", "Successive facilities at the same broad grounds; do not count overlapping historical pins as independent geography challenges." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "coordinate_source": "https://en.wikipedia.org/wiki/Crosley_Field", "site_id": "cincinnati-findlay-western", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1970, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 39.11667, "longitude": -84.53528, "source": "https://en.wikipedia.org/wiki/Crosley_Field" }, "map_point": { "latitude": 39.11667, "longitude": -84.53528, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Crosley_Field" } }, { "venue_id": "cin-riverfront-stadium", "name": "Riverfront Stadium / Cinergy Field", "city": "Cincinnati", "state_or_province": "Ohio", "country": "United States", "aliases": [ "Riverfront Stadium", "Cinergy Field" ], "opened_year": null, "latitude": null, "longitude": null, "coordinate_confidence": "unresolved", "site_note": "Reds home through 2002; shared with the NFL Bengals until 1999.", "sources": [ "https://www.mlb.com/reds/history/ballparks" ], "uncertainties": [ "Demolition year and exact coordinates are unresolved." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": null, "longitude": null, "source": null }, "site_id": "cin-riverfront-stadium", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 2002, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "cin-great-american-ball-park", "name": "Great American Ball Park", "city": "Cincinnati", "state_or_province": "Ohio", "country": "United States", "aliases": [], "opened_year": 2003, "latitude": 39.0975, "longitude": -84.50667, "coordinate_source": "https://en.wikipedia.org/wiki/Great_American_Ball_Park", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "Reds main home through the 2026 season.", "sources": [ "https://en.wikipedia.org/wiki/Great_American_Ball_Park", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest", "https://www.mlb.com/reds/history/ballparks" ], "uncertainties": [], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "cin-great-american-ball-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 4, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 39.0975, "longitude": -84.50667, "source": "https://en.wikipedia.org/wiki/Great_American_Ball_Park" }, "map_point": { "latitude": 39.097474, "longitude": -84.507037, "target_type": "dirt-circle centre", "status": "Proposed imagery point · not approved for scoring", "sources": [ "https://en.wikipedia.org/wiki/Great_American_Ball_Park", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "uncertainty_m": 10, "uncertainty_status": "Analyst estimate, not measured accuracy", "basis": "Esri imagery: home dirt circle identified" }, "coordinate_audit": { "franchise": "CIN", "venue_id": "cin-great-american-ball-park", "park_name": "Great American Ball Park", "city": "Cincinnati", "original_latitude": 39.0975, "original_longitude": -84.50667, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": 39.097474, "proposed_longitude": -84.507037, "proposed_target_type": "home plate", "displacement_m": 31.8, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Esri imagery: home dirt circle identified", "estimated_uncertainty_m": 10, "confidence": "medium-high", "source_urls": [ "https://en.wikipedia.org/wiki/Great_American_Ball_Park", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "review_status": "proposed - imagery-read home plate, not surveyed, not approved for scoring", "notes": "" }, "current_franchise": "CIN" }, { "venue_id": "ny-hilltop-park", "name": "Hilltop Park", "city": "New York", "state_or_province": "New York", "country": "United States", "aliases": [ "American League Park", "Hilltop", "home of the Highlanders" ], "opened_year": 1903, "latitude": 40.84056, "longitude": -73.94222, "coordinate_source": "https://en.wikipedia.org/wiki/Hilltop_Park", "coordinate_confidence": "unresolved", "site_note": "Yankees/Highlanders first New York home.", "sources": [ "https://en.wikipedia.org/wiki/Hilltop_Park", "https://sabr.org/bioproj/park/hilltop-park-new-york/", "https://www.baseball-reference.com/teams/NYY/index.shtml", "https://www.mlb.com/yankees/history/timeline-1900s", "https://www.mlb.com/yankees/history/year-by-year-results" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation.", "Wikipedia was used only for the numeric coordinates and infobox date precision; SABR and MLB support the historical/site claims." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "carried from sourced pilot; not re-fetched in this pass", "site_id": "ny-hilltop-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1912, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 40.84056, "longitude": -73.94222, "source": "https://en.wikipedia.org/wiki/Hilltop_Park" }, "map_point": { "latitude": 40.84056, "longitude": -73.94222, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Hilltop_Park" } }, { "venue_id": "ny-polo-grounds-final", "name": "Polo Grounds (final site) - Polo Grounds III (1890) and Polo Grounds IV (1911 rebuild)", "city": "New York", "state_or_province": "New York", "country": "United States", "aliases": [ "Brush Stadium", "Brush Stadium (1911-1919)", "Coogan's Hollow", "Polo Grounds", "Polo Grounds III", "Polo Grounds III (1891-1911)", "Polo Grounds III/IV", "Polo Grounds IV", "Polo Grounds IV (1911-1963)" ], "opened_year": 1890, "latitude": 40.83167, "longitude": -73.93722, "coordinate_source": "https://en.wikipedia.org/wiki/Polo_Grounds", "coordinate_confidence": "unresolved", "site_note": "National League grounds shared with Giants.", "sources": [ "https://ballparkdigest.com/201101193453/major-league-baseball/features/remembering-the-polo-grounds", "https://deadballbaseball.com/2013/01/the-polo-grounds-coogans-bluff-and-the-brush-memorial-stairway/", "https://en.wikipedia.org/wiki/Polo_Grounds", "https://en.wikipedia.org/wiki/Polo_Grounds_IV", "https://pologroundstowers.us/about-us/", "https://sabr.org/bioproj/park/hilltop-park-new-york/", "https://sabr.org/bioproj/park/manhattan-field-new-york/", "https://sabr.org/bioproj/park/polo-grounds-new-york/", "https://sabr.org/journal/article/the-first-and-last-games-at-the-polo-groundses/", "https://www.baseball-reference.com/teams/NYM/index.shtml", "https://www.baseball-reference.com/teams/NYY/index.shtml", "https://www.mlb.com/giants/history/ballpark", "https://www.mlb.com/mets/history/timeline-1960s", "https://www.mlb.com/yankees/history/year-by-year-results", "https://www.sabr.org/bioproj/park/polo-grounds-new-york/" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation.", "Wikipedia was used explicitly for physical-site distinctions, coordinates, demolition, and current site use; MLB supports the Yankees dates.", "1890 original facility and 1911 rebuild aggregated at site level; not a single unchanged building." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "carried from sourced pilot; not re-fetched in this pass", "site_id": "ny-polo-grounds-final", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1963, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 40.83167, "longitude": -73.93722, "source": "https://en.wikipedia.org/wiki/Polo_Grounds" }, "map_point": { "latitude": 40.83167, "longitude": -73.93722, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Polo_Grounds" }, "historical_pilot": { "venue_id": "ny-polo-grounds-final", "name": "Polo Grounds (final site) - Polo Grounds III (1890) and Polo Grounds IV (1911 rebuild)", "site_id": "ny-polo-grounds-final", "borough": "Manhattan", "location_description": "Northern half of Coogan's Hollow, Washington Heights: W. 155th St (south), Frederick Douglass Blvd/Eighth Ave (east), Harlem River Drive (west), bluff/rail yards (north), below Coogan's Bluff. Towers address on site: 2971 Eighth Avenue.", "site_point": { "latitude": 40.83167, "longitude": -73.93722, "target_type": "published_site_point", "source": "https://en.wikipedia.org/wiki/Polo_Grounds" }, "home_plate": { "status": "approximate_only", "latitude": null, "longitude": null, "note": "III and IV shared essentially the same diamond position on the same footprint (IV rebuilt 'in roughly the same semicircle around home plate'), so one approximate plate AREA for III-IV is defensible in words. A commemorative plaque in the Towers complex (described variously as on a column of Tower No. 4 / on a building wall) is said to mark the APPROXIMATE plate location; no source gives its lat/lon. The John T. Brush Stairway is off the diamond and must not be used as a plate location." }, "building_generations": [ { "generation": "Polo Grounds III", "built_as": "Brotherhood Park (Players' League)", "first_game": "1890-04-19", "notes": "Players' League folded after 1890; NL Giants moved in for 1891, bringing the Polo Grounds name (first NL game here 1891-04-22). Destroyed by fire early morning 1911-04-14 (last III game 1911-04-13); steel uprights, some bleachers and the clubhouse survived the fire." }, { "generation": "Polo Grounds IV", "type": "rebuild on the same site - NOT a rename", "reopened": "1911-06-28", "notes": "Concrete-and-steel rebuild by John T. Brush (architect Henry B. Herts) while the Giants played temporarily at Hilltop Park. Expanded 1923 to the familiar horseshoe/'bathtub' shape: 279 ft LF, 258 ft RF, 483 ft CF (listed 475 ft in the Mets years 1962-63)." } ], "names": [ { "name": "Brotherhood Park", "period": "1890" }, { "name": "Polo Grounds", "period": "1891-1911 (III)" }, { "name": "Brush Stadium", "period": "1911-1919", "note": "Formal renaming attempt for John T. Brush on the rebuilt park (evidenced on World Series programmes); never stuck, passe by the late 1910s." }, { "name": "Polo Grounds", "period": "1920-1963 (IV)" } ], "tenancies": [ { "franchise": "NYG-PL", "team": "New York Giants (Players' League)", "first_season": 1890, "last_season": 1890, "note": "A DISTINCT club from the NL Giants despite the identical name - keep franchise identity separate." }, { "franchise": "SFG", "team": "New York Giants (NL)", "first_season": 1891, "last_season": 1957, "note": "At III 1891-1911 and IV 1911-1957, with a brief Hilltop Park displacement Apr-Jun 1911 during the rebuild." }, { "franchise": "NYY", "team": "New York Yankees (AL)", "first_season": 1913, "last_season": 1922, "note": "Tenants of the Giants at IV - OVERLAPS the Giants' tenancy; not a succession." }, { "franchise": "NYM", "team": "New York Mets (NL)", "first_season": 1962, "last_season": 1963 } ], "shared_use_check": "PASS - Giants (1891-1957), Yankees (1913-1922) and Mets (1962-1963) are overlapping/sequential intervals at one site, as the brief requires; the final site is correctly shared.", "final_mlb_use": { "giants_last_game": "1957-09-29 (Pittsburgh 9-1 New York)", "park_last_regular_season_game": "1963-09-18 (Philadelphia 5-1 Mets, attendance 1,752)", "last_postseason_at_park": "1954 World Series", "note": "A Latin All-Star Game followed in Oct 1963; the final sporting event was an AFL game 1963-12-14. Do not label the 1963 game postseason." }, "demolition": { "began": "1964-04-10", "note": "Levelled over more than four months (crew of ~60; one account says the same wrecking ball used at Ebbets Field). No separate III demolition - III burned in 1911." }, "site_today": "Polo Grounds Towers (NYCHA): four 30-storey buildings, 1,616 apartments, completed 1968-06-30, on the 15.15-acre hollow. Willie Mays Playground is on/adjacent to the site in some accounts.", "markers_and_survivals": [ { "type": "commemorative_plaque_approximate", "description": "Plaque in the Towers complex marking the approximate home-plate location (see home_plate note).", "is_original_plate": false }, { "type": "commemorative_plaque_general", "description": "Second plaque at 2971 Eighth Ave: 'This development was built on the location that Willie Mays and the Giants made famous.' Site commemoration, not a plate marker.", "is_original_plate": false }, { "type": "surviving_structure_original", "description": "John T. Brush Stairway (opened 1913), from Edgecombe Ave at about W. 158th St down Coogan's Bluff to Harlem River Drive; the sole surviving original structure. Restored in the 2010s. Off the diamond - a georeferencing landmark, not a plate point.", "is_original_plate": false } ], "exploratory_map": "yes - site point, generations distinguished", "recommended_for_scoring": false, "counting_note": "Sources count 3, 4 or 5 'Polo Groundses' (SABR counts the 110th St grounds as one facility with two diamonds, then II, III, IV = 4 facilities). This pilot keeps I, II and the final site as three site records with III/IV as generations of the final site.", "sources": [ "https://sabr.org/journal/article/the-first-and-last-games-at-the-polo-groundses/", "https://sabr.org/bioproj/park/manhattan-field-new-york/", "https://en.wikipedia.org/wiki/Polo_Grounds", "https://en.wikipedia.org/wiki/Polo_Grounds_IV", "https://deadballbaseball.com/2013/01/the-polo-grounds-coogans-bluff-and-the-brush-memorial-stairway/", "https://ballparkdigest.com/201101193453/major-league-baseball/features/remembering-the-polo-grounds" ] } }, { "venue_id": "ny-yankee-stadium-1923", "name": "Yankee Stadium (1923 facility)", "city": "New York", "state_or_province": "New York", "country": "United States", "aliases": [ "Old Yankee Stadium", "Original Yankee Stadium", "The House That Ruth Built", "Yankee Stadium I" ], "opened_year": 1923, "latitude": 40.82694, "longitude": -73.92806, "coordinate_source": "https://en.wikipedia.org/wiki/Yankee_Stadium_(1923)", "coordinate_confidence": "unresolved", "site_note": "Original stadium, including 1976 reopening after reconstruction; treated as one physical Yankee Stadium site.", "sources": [ "https://bronxpinstripes.com/articles/yankee-stadium-closes-its-doors", "https://catalogs.scpauctions.com/online-auctions/scp-auctions-inc/historic-and-unique-original-home-plate-from-yankee-stadium-circa-1923-al-tapper-collection---psa-dna-loa-5990736", "https://en.wikipedia.org/wiki/Yankee_Stadium_(1923)", "https://www.baseball-reference.com/bullpen/Yankee_Stadium_I", "https://www.baseball-reference.com/teams/NYY/index.shtml", "https://www.mlb.com/yankees/history/year-by-year-results" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation.", "Wikipedia was used explicitly for coordinates, dates, physical-footprint distinction, tenants, and Heritage Field; MLB supports the regular-season venue labels and 1976 renovation notation." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "carried from sourced pilot; not re-fetched in this pass", "site_id": "ny-yankee-stadium-1923", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 2008, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 40.82694, "longitude": -73.92806, "source": "https://en.wikipedia.org/wiki/Yankee_Stadium_(1923)" }, "map_point": { "latitude": 40.82694, "longitude": -73.92806, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Yankee_Stadium_(1923)" }, "historical_pilot": { "venue_id": "ny-yankee-stadium-1923", "name": "Yankee Stadium (1923 facility)", "site_id": "ny-yankee-stadium-1923", "borough": "Bronx", "location_description": "East 161st Street & River Avenue, Bronx, NY 10451; south side of E. 161st St, across the street south of the 2009 stadium; built on a former lumberyard.", "site_point": { "latitude": 40.82694, "longitude": -73.92806, "target_type": "published_site_point", "source": "https://en.wikipedia.org/wiki/Yankee_Stadium_(1923)" }, "home_plate": { "status": "approximate_only", "latitude": null, "longitude": null, "note": "No sourced plate lat/lon exists. Heritage Field (the park now on the site) has a blue outline of the original diamond in the grass of its southern field; at the park's opening, second base of the new field was at the APPROXIMATE location of original home plate (source wording is 'approximate'). The 1923-73 plate itself was removed in the 1970s renovation and is in private/auction provenance, not on site." }, "opened": { "date": "1923-04-18", "note": "Groundbreaking 1922-05-05. Yankees 4-1 Boston in the opener." }, "rebuilds": [ { "type": "gut renovation (same building, same site - NOT a new venue)", "period": "Oct 1973 - Apr 1976", "reopened": "1976-04-15", "note": "Yankees absent 1974-75 (at Shea Stadium) - a tenancy gap, not a venue change." } ], "names": [ { "name": "Yankee Stadium", "period": "1923-2008", "note": "'The House That Ruth Built' etc. are nicknames, not formal renames. No sponsor name ever." } ], "tenancies": [ { "franchise": "NYY", "team": "New York Yankees (AL)", "first_season": 1923, "last_season": 1973 }, { "franchise": "NYY", "team": "New York Yankees (AL)", "first_season": 1976, "last_season": 2008 } ], "final_mlb_use": { "last_regular_season_game": "2008-09-21 (Yankees 7-3 Baltimore)", "last_postseason": "2007 (Yankees did not reach the 2008 postseason)", "note": "Final tour 2008-11-09." }, "demolition": { "completed": "2010-05-13", "start": "disputed by phase: 2008-09-22 (older accounts) / 2009-03-16 (current Wikipedia) / 2009-11-04 (NYC sites list) - salvage vs structural phases; completion date is consistent", "status": "unresolved_start_date" }, "site_today": "Heritage Field, a ~10-11 acre public park (opened April 2012) with three ballfields and Ruppert Plaza. Verified in this project's 2026-10-26 Esri aerial read: three diamonds and a soccer field on the parcel, parking to the south.", "markers_and_survivals": [ { "type": "commemorative_approximation", "description": "Blue outline of original diamond in Heritage Field grass; new field's second base at approximate original plate location.", "is_original_plate": false }, { "type": "surviving_fragment", "description": "A section of the original frieze preserved in the park's NW corner; the bat-shaped smokestack/chimney is preserved.", "is_original_plate": false } ], "exploratory_map": "yes - site point", "recommended_for_scoring": false, "sources": [ "https://en.wikipedia.org/wiki/Yankee_Stadium_(1923)", "https://www.baseball-reference.com/bullpen/Yankee_Stadium_I", "https://bronxpinstripes.com/articles/yankee-stadium-closes-its-doors", "https://catalogs.scpauctions.com/online-auctions/scp-auctions-inc/historic-and-unique-original-home-plate-from-yankee-stadium-circa-1923-al-tapper-collection---psa-dna-loa-5990736" ] } }, { "venue_id": "ny-shea-stadium", "name": "Shea Stadium", "city": "Queens", "state_or_province": "New York", "country": "United States", "aliases": [ "Flushing Meadows stadium", "Shea", "Shea Stadium", "William A. Shea Municipal Stadium" ], "opened_year": 1964, "latitude": 40.75556, "longitude": -73.84806, "coordinate_source": "https://en.wikipedia.org/wiki/Shea_Stadium", "coordinate_confidence": "unresolved", "site_note": "Temporary Yankee home during Yankee Stadium reconstruction.", "sources": [ "https://en.wikipedia.org/wiki/Shea_Stadium", "https://en.wikipedia.org/wiki/Yankee_Stadium_(1923)", "https://mapcarta.com/N5334055583", "https://www.ballparksofbaseball.com/ballparks/shea-stadium/", "https://www.baseball-reference.com/teams/NYM/index.shtml", "https://www.baseball-reference.com/teams/NYY/index.shtml", "https://www.mlb.com/mets/history/mets-hall-of-fame", "https://www.mlb.com/mets/history/timeline-1960s", "https://www.mlb.com/yankees/history/year-by-year-results", "https://www.qgazette.com/articles/when-mets-yankees-called-shea-stadium-home/", "https://www.untappedcities.com/7-of-nycs-lost-baseball-stadiums/" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation.", "Wikipedia was used explicitly for location, coordinates, Yankees temporary tenancy, demolition, and current site use; the original-stadium page and MLB provide the renovation/context cross-check." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "carried from sourced pilot; not re-fetched in this pass", "site_id": "ny-shea-stadium", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 2008, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 40.75556, "longitude": -73.84806, "source": "https://en.wikipedia.org/wiki/Shea_Stadium" }, "map_point": { "latitude": 40.75556, "longitude": -73.84806, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Shea_Stadium" }, "historical_pilot": { "venue_id": "ny-shea-stadium", "name": "Shea Stadium", "site_id": "ny-shea-stadium", "borough": "Queens", "location_description": "Former Shea Stadium site, southwest of Citi Field, now within the Citi Field parking complex. Direction corrected by the imagery supplement; plate-marker coordinates remain unresolved.", "site_point": { "latitude": 40.75556, "longitude": -73.84806, "target_type": "published_site_point", "source": "https://en.wikipedia.org/wiki/Shea_Stadium" }, "home_plate": { "status": "marker_documented_coordinates_unresolved", "latitude": null, "longitude": null, "note": "In-ground markers in the Citi Field parking lot mark the original locations of home plate, the mound, and first/second/third base - documented by multiple independent visitor/guide sources, but no independently sourced lat/lon for the plate marker was found. WARNING: an OpenStreetMap/Mapcarta node for a Shea memorial carries exactly the published stadium point (40.75556, -73.84806) - a copied point, NOT a verified marker position; do not ingest it as plate-accurate." }, "opened": { "date": "1964-04-17", "note": "Groundbreaking 1961-10-28. Mets vs Pittsburgh in the opener." }, "names": [ { "name": "Flushing Meadow Park / Flushing Meadow Park Municipal Stadium", "period": "planning name, 1961-1962" }, { "name": "William A. Shea Municipal Stadium (Shea Stadium)", "period": "1964-2008", "note": "No later rename." } ], "tenancies": [ { "franchise": "NYM", "team": "New York Mets (NL)", "first_season": 1964, "last_season": 2008 }, { "franchise": "NYY", "team": "New York Yankees (AL)", "first_season": 1974, "last_season": 1975, "note": "Full two-season temporary residence during the Yankee Stadium renovation - preserve as a full tenancy, NOT selected games. Non-MLB: Jets 1964-83, NFL Giants 1975." } ], "final_mlb_use": { "last_regular_season_game": "2008-09-28 (Mets lost 4-2 to Florida)", "last_postseason": "2006 (Mets did not reach the 2008 postseason)" }, "demolition": { "period": "2008-10-14 to 2009-02-18", "note": "Phased dismantling; final section down 2009-02-18." }, "site_today": "Surface parking for Citi Field.", "markers_and_survivals": [ { "type": "in_situ_marker", "description": "In-ground markers for home plate, mound, 1B, 2B, 3B in the Citi Field parking lot at their original locations.", "is_original_plate": false, "note": "Markers are commemorative but in-situ (they mark original locations)." }, { "type": "relocated_survival", "description": "Original Shea Home Run Apple outside Citi Field's Jackie Robinson Rotunda; Shea scoreboard skyline silhouette preserved inside Citi Field.", "is_original_plate": false } ], "exploratory_map": "yes - site point", "recommended_for_scoring": false, "sources": [ "https://en.wikipedia.org/wiki/Shea_Stadium", "https://www.untappedcities.com/7-of-nycs-lost-baseball-stadiums/", "https://mapcarta.com/N5334055583", "https://www.qgazette.com/articles/when-mets-yankees-called-shea-stadium-home/" ] } }, { "venue_id": "ny-yankee-stadium-2009", "name": "Yankee Stadium (2009 facility)", "city": "New York", "state_or_province": "New York", "country": "United States", "aliases": [ "New Yankee Stadium", "Yankee Stadium", "Yankee Stadium II", "current Yankee Stadium" ], "opened_year": 2009, "latitude": 40.82917, "longitude": -73.92639, "coordinate_source": "https://en.wikipedia.org/wiki/Yankee_Stadium", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Yankee_Stadium", "https://www.baseball-reference.com/teams/NYY/index.shtml", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest", "https://www.mlb.com/yankees/ballpark", "https://www.mlb.com/yankees/history/year-by-year-results" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation.", "Wikipedia was used explicitly for numeric coordinates, opening dates, current tenants, and the Macombs Dam Park/one-block physical distinction; MLB is the official source for current home status and address." ], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "ny-yankee-stadium-2009", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 40.82917, "longitude": -73.92639, "source": "https://en.wikipedia.org/wiki/Yankee_Stadium" }, "map_point": { "latitude": 40.829487, "longitude": -73.926954, "target_type": "dirt-circle centre", "status": "Proposed imagery point · not approved for scoring", "sources": [ "https://en.wikipedia.org/wiki/Yankee_Stadium", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "uncertainty_m": 10, "uncertainty_status": "Analyst estimate, not measured accuracy", "basis": "Esri imagery: home dirt circle identified" }, "coordinate_audit": { "franchise": "NYY", "venue_id": "ny-yankee-stadium-2009", "park_name": "Yankee Stadium", "city": "New York", "original_latitude": 40.82917, "original_longitude": -73.92639, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": 40.829487, "proposed_longitude": -73.926954, "proposed_target_type": "home plate", "displacement_m": 59.1, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Esri imagery: home dirt circle identified", "estimated_uncertainty_m": 10, "confidence": "medium-high", "source_urls": [ "https://en.wikipedia.org/wiki/Yankee_Stadium", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "review_status": "proposed - imagery-read home plate, not surveyed, not approved for scoring", "notes": "Also a Phase 2 pilot venue; see the New York pilot JSON for the paired 1923 facility record." }, "current_franchise": "NYY", "historical_pilot": { "venue_id": "ny-yankee-stadium-2009", "name": "Yankee Stadium (2009 facility)", "site_id": "ny-yankee-stadium-2009", "borough": "Bronx", "location_description": "1 East 161st Street, Bronx, NY 10451; one block north of the 1923 stadium, on the former Macombs Dam Park site.", "site_point": { "latitude": 40.82917, "longitude": -73.92639, "target_type": "published_site_point", "source": "https://en.wikipedia.org/wiki/Yankee_Stadium" }, "home_plate": { "status": "established_from_imagery_phase1", "latitude": 40.829487, "longitude": -73.926954, "target_type": "imagery_home_plate", "note": "Read from Esri World Imagery zoom 19 in Phase 1 of this project (see current-park audit, franchise NYY). Imagery-derived, not surveyed; estimated uncertainty ±10 m." }, "opened": { "date": "2009-04-16", "note": "First regular-season game. First exhibition 2009-04-03 vs Chicago Cubs; workout day 2009-04-02. Groundbreaking Aug 2006." }, "names": [ { "name": "Yankee Stadium", "period": "2009-present", "note": "No formal rename or sponsor name." } ], "tenancies": [ { "franchise": "NYY", "team": "New York Yankees (AL)", "first_season": 2009, "last_season": null, "note": "Current home as of 2026-10-26. Also NYCFC (MLS) 2015-present - non-MLB, note only." } ], "final_mlb_use": null, "demolition": null, "site_today": "The stadium itself, in use.", "markers_and_survivals": [ { "type": "relocated_commemorative", "description": "Monument Park inside contains monuments/plaques relocated from the 1923 stadium - relocated material, not in-situ locations.", "is_original_plate": false } ], "exploratory_map": "yes - site point and imagery plate point", "recommended_for_scoring": false, "modelling_note": "Separate venue_id AND site_id from the 1923 facility despite the identical name - different physical site across E. 161st St.", "sources": [ "https://en.wikipedia.org/wiki/Yankee_Stadium" ] } }, { "venue_id": "queens-citi-field", "name": "Citi Field", "city": "Queens", "state_or_province": "New York", "country": "United States", "aliases": [ "Citi Field", "Mets ballpark at Willets Point" ], "opened_year": 2009, "latitude": 40.75694, "longitude": -73.84583, "coordinate_source": "https://en.wikipedia.org/wiki/Citi_Field", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Citi_Field", "https://www.baseball-reference.com/teams/NYM/index.shtml", "https://www.mlb.com/mets/ballpark", "https://www.mlb.com/mets/ballpark/visit-new-york-city", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest", "https://www.nbcsports.com/mlb/news/mets-name-street-after-tom-seaver-announce-plans-for-statue" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "queens-citi-field", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 40.75694, "longitude": -73.84583, "source": "https://en.wikipedia.org/wiki/Citi_Field" }, "map_point": { "latitude": 40.756581, "longitude": -73.846026, "target_type": "plate-tarp centre (plate covered)", "status": "Proposed imagery point · not approved for scoring", "sources": [ "https://en.wikipedia.org/wiki/Citi_Field", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "uncertainty_m": 10, "uncertainty_status": "Analyst estimate, not measured accuracy", "basis": "Esri imagery: home dirt circle identified" }, "coordinate_audit": { "franchise": "NYM", "venue_id": "queens-citi-field", "park_name": "Citi Field", "city": "Queens", "original_latitude": 40.75694, "original_longitude": -73.84583, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": 40.756581, "proposed_longitude": -73.846026, "proposed_target_type": "home plate", "displacement_m": 43.2, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Esri imagery: home dirt circle identified", "estimated_uncertainty_m": 10, "confidence": "medium-high", "source_urls": [ "https://en.wikipedia.org/wiki/Citi_Field", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "review_status": "proposed - imagery-read home plate, not surveyed, not approved for scoring", "notes": "Also a Phase 2 pilot venue; see the New York pilot JSON for the paired Shea Stadium record." }, "current_franchise": "NYM", "historical_pilot": { "venue_id": "queens-citi-field", "name": "Citi Field", "site_id": "queens-citi-field", "borough": "Queens", "location_description": "Citi Field in Queens, northeast of the former Shea Stadium site.", "site_point": { "latitude": 40.75694, "longitude": -73.84583, "target_type": "published_site_point", "source": "https://en.wikipedia.org/wiki/Citi_Field" }, "home_plate": { "status": "established_from_imagery_phase1", "latitude": 40.756581, "longitude": -73.846026, "target_type": "imagery_home_plate", "note": "Read from Esri World Imagery zoom 19 in Phase 1 of this project (see current-park audit, franchise NYM). Imagery-derived, not surveyed; estimated uncertainty ±10 m." }, "opened": { "date": "2009-04-13", "note": "First Mets regular-season game, vs San Diego. First game at the park was a college game 2009-03-29 (St. John's vs Georgetown); Mets exhibition 2009-04-03. Groundbreaking 2006-11-13." }, "names": [ { "name": "Citi Field", "period": "2009-present", "note": "Citigroup naming rights since opening; no former formal name. The 2019 street-address change is not a venue rename." } ], "tenancies": [ { "franchise": "NYM", "team": "New York Mets (NL)", "first_season": 2009, "last_season": null, "note": "Current home as of 2026-10-26." } ], "final_mlb_use": null, "demolition": null, "site_today": "The stadium itself, in use. Its Jackie Robinson Rotunda facade deliberately evokes Ebbets Field - a design homage, not a surviving Ebbets structure.", "markers_and_survivals": [], "exploratory_map": "yes - site point and imagery plate point", "recommended_for_scoring": false, "modelling_note": "Separate venue_id AND site_id from Shea Stadium - adjacent parcels, not the same footprint.", "sources": [ "https://en.wikipedia.org/wiki/Citi_Field", "https://www.nbcsports.com/mlb/news/mets-name-street-after-tom-seaver-announce-plans-for-statue" ] } }, { "venue_id": "boston-huntington-avenue-grounds", "name": "Huntington Avenue Grounds", "city": "Boston", "state_or_province": "Massachusetts", "country": "United States", "aliases": [ "Huntington Avenue Baseball Grounds", "Huntington Avenue Grounds" ], "opened_year": 1901, "latitude": 42.33889, "longitude": -71.08889, "coordinate_source": "https://en.wikipedia.org/wiki/Huntington_Avenue_Grounds", "coordinate_confidence": "unresolved", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Huntington_Avenue_Grounds", "https://news.northeastern.edu/2025/08/26/faculty-staff/northeastern-art-scene-cy-young-memorial/", "https://sabr.org/bioproj/park/huntington-avenue-grounds-boston-ma/", "https://www.masshist.org/database/viewer.php?item_id=2507&pid=3", "https://www.mlb.com/redsox/history/ballparks" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "carried from sourced pilot; not re-fetched in this pass", "site_id": "boston-huntington-avenue-grounds", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1911, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 42.33889, "longitude": -71.08889, "source": "https://en.wikipedia.org/wiki/Huntington_Avenue_Grounds" }, "map_point": { "latitude": 42.33889, "longitude": -71.08889, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Huntington_Avenue_Grounds" } }, { "venue_id": "boston-fenway-park", "name": "Fenway Park", "city": "Boston", "state_or_province": "Massachusetts", "country": "United States", "aliases": [ "Fenway Park" ], "opened_year": 1912, "latitude": 42.34639, "longitude": -71.09778, "coordinate_source": "https://en.wikipedia.org/wiki/Fenway_Park", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Fenway_Park", "https://www.mlb.com/braves/history/ballpark", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest", "https://www.mlb.com/redsox/ballpark", "https://www.mlb.com/redsox/ballpark/facts-figures", "https://www.mlb.com/redsox/history/ballparks" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "boston-fenway-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 42.34639, "longitude": -71.09778, "source": "https://en.wikipedia.org/wiki/Fenway_Park" }, "map_point": { "latitude": 42.346248, "longitude": -71.09777, "target_type": "dirt-circle centre", "status": "Proposed imagery point · not approved for scoring", "sources": [ "https://en.wikipedia.org/wiki/Fenway_Park", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "uncertainty_m": 10, "uncertainty_status": "Analyst estimate, not measured accuracy", "basis": "Esri imagery: home dirt circle identified" }, "coordinate_audit": { "franchise": "BOS", "venue_id": "boston-fenway-park", "park_name": "Fenway Park", "city": "Boston", "original_latitude": 42.34639, "original_longitude": -71.09778, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": 42.346248, "proposed_longitude": -71.09777, "proposed_target_type": "home plate", "displacement_m": 15.8, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Esri imagery: home dirt circle identified", "estimated_uncertainty_m": 10, "confidence": "medium-high", "source_urls": [ "https://en.wikipedia.org/wiki/Fenway_Park", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "review_status": "proposed - imagery-read home plate, not surveyed, not approved for scoring", "notes": "" }, "current_franchise": "BOS" }, { "venue_id": "mil-lloyd-street", "name": "Lloyd Street Grounds", "city": "Milwaukee", "state_or_province": "Wisconsin", "country": "United States", "aliases": [], "opened_year": 1895, "latitude": 43.05889, "longitude": -87.93389, "coordinate_source": "https://en.wikipedia.org/wiki/Lloyd_Street_Grounds", "coordinate_confidence": "published stadium/site point; footprint not surveyed", "site_note": "Milwaukee Brewers 1901 AL season; exact ground naming/season boundary needs reconciliation.", "sources": [ "https://en.wikipedia.org/wiki/Lloyd_Street_Grounds", "https://www.mlb.com/orioles/history/ballparks" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "mil-lloyd-street", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1901, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 43.05889, "longitude": -87.93389, "source": "https://en.wikipedia.org/wiki/Lloyd_Street_Grounds" }, "map_point": { "latitude": 43.05889, "longitude": -87.93389, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Lloyd_Street_Grounds" } }, { "venue_id": "stl-sportsmans-park", "name": "Sportsman’s Park", "city": "St. Louis", "state_or_province": "Missouri", "country": "United States", "aliases": [ "Browns Park", "Busch Stadium I", "Grand Avenue Park", "Sportsman's Park" ], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "site_note": "St. Louis Browns home through 1953; later Cardinals venue, not Orioles after relocation.", "sources": [ "https://www.mlb.com/cardinals/history/ballparks", "https://www.mlb.com/orioles/history/ballparks" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation.", "Site-level record includes early and rebuilt Sportsman’s Park; building generations are not resolved into separate footprints." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": null, "longitude": null, "source": null }, "site_id": "stl-sportsmans-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1966, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "bal-memorial-stadium", "name": "Memorial Stadium", "city": "Baltimore", "state_or_province": "Maryland", "country": "United States", "aliases": [], "opened_year": 1950, "latitude": 39.32944, "longitude": -76.60139, "coordinate_source": "https://en.wikipedia.org/wiki/Memorial_Stadium_(Baltimore)", "coordinate_confidence": "published stadium/site point; footprint not surveyed", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Memorial_Stadium_(Baltimore)", "https://www.mlb.com/orioles/history/ballparks" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "bal-memorial-stadium", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1991, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 39.32944, "longitude": -76.60139, "source": "https://en.wikipedia.org/wiki/Memorial_Stadium_(Baltimore)" }, "map_point": { "latitude": 39.32944, "longitude": -76.60139, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Memorial_Stadium_(Baltimore)" } }, { "venue_id": "bal-camden-yards", "name": "Oriole Park at Camden Yards", "city": "Baltimore", "state_or_province": "Maryland", "country": "United States", "aliases": [], "opened_year": 1992, "latitude": 39.28389, "longitude": -76.62167, "coordinate_source": "https://en.wikipedia.org/wiki/Oriole_Park_at_Camden_Yards", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Oriole_Park_at_Camden_Yards", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest", "https://www.mlb.com/orioles/history/ballparks" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "bal-camden-yards", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 39.28389, "longitude": -76.62167, "source": "https://en.wikipedia.org/wiki/Oriole_Park_at_Camden_Yards" }, "map_point": { "latitude": 39.283508, "longitude": -76.621914, "target_type": "plate-tarp centre (plate covered)", "status": "Proposed imagery point · not approved for scoring", "sources": [ "https://en.wikipedia.org/wiki/Oriole_Park_at_Camden_Yards", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "uncertainty_m": 10, "uncertainty_status": "Analyst estimate, not measured accuracy", "basis": "Centre of the round home-plate tarp (grid read: disc x 515-585, y 800-850). The earlier pick sat on the tarp's top edge." }, "coordinate_audit": { "franchise": "BAL", "venue_id": "bal-camden-yards", "park_name": "Oriole Park at Camden Yards", "city": "Baltimore", "original_latitude": 39.28389, "original_longitude": -76.62167, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": 39.283541, "proposed_longitude": -76.621914, "proposed_target_type": "home plate", "displacement_m": 44.1, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Esri imagery: home dirt circle identified", "estimated_uncertainty_m": 10, "confidence": "medium-high", "source_urls": [ "https://en.wikipedia.org/wiki/Oriole_Park_at_Camden_Yards", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "review_status": "proposed - imagery-read home plate, not surveyed, not approved for scoring", "notes": "" }, "coordinate_correction": { "venue_id": "bal-camden-yards", "park_name": "Oriole Park at Camden Yards", "status": "corrected proposal - PROPOSED, not approved for scoring", "previous_proposal": { "latitude": 39.283541, "longitude": -76.621914, "displacement_from_published_m": 44.1, "canvas_pixel": [ 550, 809 ], "source": "first package audit / supplement plate_evidence.json (preserved unchanged)" }, "corrected_proposal": { "latitude": 39.283508, "longitude": -76.621914, "displacement_from_published_m": 47.4, "canvas_pixel": [ 550, 825 ], "canvas": "imagery", "canvas_top_left_global_px": [ 38541594, 51158112 ], "point_class": "plate-tarp centre (plate covered)" }, "proposal_shift_m": 3.7, "basis": "Centre of the round home-plate tarp (grid read: disc x 515-585, y 800-850). The earlier pick sat on the tarp's top edge.", "estimated_uncertainty_m": 10, "after_crop": "after/bal-camden-yards_corrected.png", "before_crop": "before/bal-camden-yards_before.png" }, "current_franchise": "BAL" }, { "venue_id": "tor-exhibition-stadium", "name": "Exhibition Stadium", "city": "Toronto", "state_or_province": "Ontario", "country": "Canada", "aliases": [], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "site_note": "", "sources": [ "https://www.mlb.com/bluejays/history/ballparks" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": null, "longitude": null, "source": null }, "site_id": "tor-exhibition-stadium", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1989, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "tor-rogers-centre", "name": "Rogers Centre", "city": "Toronto", "state_or_province": "Ontario", "country": "Canada", "aliases": [ "SkyDome" ], "opened_year": 1989, "latitude": 43.64139, "longitude": -79.38917, "coordinate_source": "https://en.wikipedia.org/wiki/Rogers_Centre", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Rogers_Centre", "https://www.mlb.com/bluejays/history/ballparks", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "tor-rogers-centre", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 43.64139, "longitude": -79.38917, "source": "https://en.wikipedia.org/wiki/Rogers_Centre" }, "map_point": { "latitude": 43.64139, "longitude": -79.38917, "target_type": "Published site point", "status": "Venue point only · home plate unresolved", "source": "https://en.wikipedia.org/wiki/Rogers_Centre" }, "coordinate_audit": { "franchise": "TOR", "venue_id": "tor-rogers-centre", "park_name": "Rogers Centre", "city": "Toronto", "original_latitude": 43.64139, "original_longitude": -79.38917, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": null, "proposed_longitude": null, "proposed_target_type": "none - unresolved", "displacement_m": null, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed; Bing Maps aerial tiles (zoom 19) as second source", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Roof closed in both Esri World Imagery and Bing aerial; home plate not identifiable from aerial imagery.", "estimated_uncertainty_m": null, "confidence": "unresolved", "source_urls": [ "https://en.wikipedia.org/wiki/Rogers_Centre", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer", "https://www.bing.com/maps (aerial tile service)" ], "review_status": "unresolved - do not use as home plate", "notes": "Retractable roof closed in both available aerial sources. Original published point retained as a venue point only." }, "current_franchise": "TOR" }, { "venue_id": "tor-sahlen-field", "name": "Sahlen Field", "city": "Buffalo", "state_or_province": "New York", "country": "United States", "aliases": [ "Coca-Cola Field" ], "opened_year": 1988, "latitude": 42.881306, "longitude": -78.874278, "coordinate_source": "https://en.wikipedia.org/wiki/Sahlen_Field", "coordinate_confidence": "published stadium/site point; footprint not surveyed", "site_note": "Pandemic temporary home.", "sources": [ "https://en.wikipedia.org/wiki/Sahlen_Field", "https://www.mlb.com/bluejays/history/ballparks" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "tor-sahlen-field", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 2021, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 6, "longitude": 6 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 42.881306, "longitude": -78.874278, "source": "https://en.wikipedia.org/wiki/Sahlen_Field" }, "map_point": { "latitude": 42.881306, "longitude": -78.874278, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Sahlen_Field" } }, { "venue_id": "tor-td-ballpark", "name": "TD Ballpark", "city": "Dunedin", "state_or_province": "Florida", "country": "United States", "aliases": [ "Dunedin Stadium" ], "opened_year": 1990, "latitude": 28.00361, "longitude": -82.78639, "coordinate_source": "https://en.wikipedia.org/wiki/TD_Ballpark", "coordinate_confidence": "published stadium/site point; footprint not surveyed", "site_note": "Pandemic temporary home for part of 2021.", "sources": [ "https://en.wikipedia.org/wiki/TD_Ballpark", "https://www.mlb.com/bluejays/history/ballparks" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "tor-td-ballpark", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 2021, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 28.00361, "longitude": -82.78639, "source": "https://en.wikipedia.org/wiki/TD_Ballpark" }, "map_point": { "latitude": 28.00361, "longitude": -82.78639, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/TD_Ballpark" } }, { "venue_id": "boston-south-end-grounds", "name": "South End Grounds", "city": "Boston", "state_or_province": "Massachusetts", "country": "United States", "aliases": [ "Boston Base Ball Grounds", "Boston National League Base Ball Park", "Grand Pavilion", "Union Baseball Grounds", "Walpole Street Grounds" ], "opened_year": 1871, "latitude": 42.3375, "longitude": -71.08694, "coordinate_source": "https://en.wikipedia.org/wiki/South_End_Grounds", "coordinate_confidence": "unresolved", "site_note": "Successive physical structures consolidated here.", "sources": [ "https://en.wikipedia.org/wiki/South_End_Grounds", "https://sabr.org/bioproj/park/south-end-grounds-boston/", "https://www.mlb.com/braves/history/ballpark" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "carried from sourced pilot; not re-fetched in this pass", "site_id": "boston-south-end-grounds", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1914, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 4, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 42.3375, "longitude": -71.08694, "source": "https://en.wikipedia.org/wiki/South_End_Grounds" }, "map_point": { "latitude": 42.3375, "longitude": -71.08694, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/South_End_Grounds" } }, { "venue_id": "boston-congress-street-grounds", "name": "Congress Street Grounds", "city": "Boston", "state_or_province": "Massachusetts", "country": "United States", "aliases": [], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": "https://en.wikipedia.org/wiki/South_End_Grounds", "coordinate_confidence": "unresolved", "site_note": "Temporary home during South End Grounds repairs.", "sources": [ "https://en.wikipedia.org/wiki/South_End_Grounds", "https://sabr.org/bioproj/park/south-end-grounds-boston/", "https://www.mlb.com/braves/history/ballpark" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "carried from sourced pilot; not re-fetched in this pass", "site_id": "boston-congress-street-grounds", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1894, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": "https://en.wikipedia.org/wiki/South_End_Grounds" }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/South_End_Grounds" } }, { "venue_id": "boston-braves-field", "name": "Braves Field", "city": "Boston", "state_or_province": "Massachusetts", "country": "United States", "aliases": [ "National League Park", "The Beehive", "The Wigwam" ], "opened_year": 1915, "latitude": 42.35333, "longitude": -71.11917, "coordinate_source": "https://en.wikipedia.org/wiki/Braves_Field", "coordinate_confidence": "unresolved", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Braves_Field", "https://sabr.org/journal/article/braves-field-to-nickerson-field-baseball-football-soccer-and-everything-in-between/", "https://www.bu.edu/preservation/scholarship/student-work/braves-field-afterlife/", "https://www.mlb.com/braves/history/ballpark" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "carried from sourced pilot; not re-fetched in this pass", "site_id": "boston-braves-field", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1952, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 42.35333, "longitude": -71.11917, "source": "https://en.wikipedia.org/wiki/Braves_Field" }, "map_point": { "latitude": 42.35333, "longitude": -71.11917, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Braves_Field" } }, { "venue_id": "mil-county-stadium", "name": "Milwaukee County Stadium", "city": "Milwaukee", "state_or_province": "Wisconsin", "country": "United States", "aliases": [ "Milwaukee County Stadium" ], "opened_year": 1953, "latitude": 43.03, "longitude": -87.974, "coordinate_source": "https://en.wikipedia.org/wiki/Milwaukee_County_Stadium", "coordinate_confidence": "published stadium/site point; footprint not surveyed", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Milwaukee_County_Stadium", "https://www.mlb.com/braves/history/ballpark", "https://www.mlb.com/brewers/history/ballparks" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "mil-county-stadium", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 2000, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 2, "longitude": 3 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified", "coarse_published_component_3_or_fewer_decimals" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 43.03, "longitude": -87.974, "source": "https://en.wikipedia.org/wiki/Milwaukee_County_Stadium" }, "map_point": { "latitude": 43.03, "longitude": -87.974, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Milwaukee_County_Stadium" } }, { "venue_id": "atl-fulton-county", "name": "Atlanta-Fulton County Stadium", "city": "Atlanta", "state_or_province": "Georgia", "country": "United States", "aliases": [ "Atlanta Stadium" ], "opened_year": 1965, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "site_note": "", "sources": [ "https://www.mlb.com/braves/history/ballpark" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": null, "longitude": null, "source": null }, "site_id": "atl-fulton-county", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1996, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "atl-turner-field", "name": "Turner Field", "city": "Atlanta", "state_or_province": "Georgia", "country": "United States", "aliases": [], "opened_year": 1996, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "site_note": "", "sources": [ "https://www.mlb.com/braves/history/ballpark" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation.", "1996 Olympic stadium converted for baseball in 1997; opened_year is the physical predecessor, not first Braves season." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": null, "longitude": null, "source": null }, "site_id": "atl-turner-field", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 2016, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "atl-truist-park", "name": "Truist Park", "city": "Atlanta", "state_or_province": "Georgia", "country": "United States", "aliases": [ "SunTrust Park" ], "opened_year": 2017, "latitude": 33.89, "longitude": -84.468, "coordinate_source": "https://en.wikipedia.org/wiki/Truist_Park", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Truist_Park", "https://www.mlb.com/braves/history/ballpark", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "atl-truist-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 2, "longitude": 3 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified", "coarse_published_component_3_or_fewer_decimals" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 33.89, "longitude": -84.468, "source": "https://en.wikipedia.org/wiki/Truist_Park" }, "map_point": { "latitude": 33.89112, "longitude": -84.467882, "target_type": "dirt-circle centre", "status": "Proposed imagery point · not approved for scoring", "sources": [ "https://en.wikipedia.org/wiki/Truist_Park", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "uncertainty_m": 8, "uncertainty_status": "Analyst estimate, not measured accuracy", "basis": "Esri imagery: home dirt circle center, confirmed on labeled crop; foul lines converge in circle" }, "coordinate_audit": { "franchise": "ATL", "venue_id": "atl-truist-park", "park_name": "Truist Park", "city": "Atlanta", "original_latitude": 33.89, "original_longitude": -84.468, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": 33.89112, "proposed_longitude": -84.467882, "proposed_target_type": "home plate", "displacement_m": 125.0, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Esri imagery: home dirt circle center, confirmed on labeled crop; foul lines converge in circle", "estimated_uncertainty_m": 8, "confidence": "high", "source_urls": [ "https://en.wikipedia.org/wiki/Truist_Park", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "review_status": "proposed - imagery-read home plate, not surveyed, not approved for scoring", "notes": "Largest correction in the audit. Original point had only 3 decimal places (33.89, -84.468) and sits ~125 m SE of home plate, toward center field. Proposed point is the center of the home-plate dirt circle in Esri imagery." }, "current_franchise": "ATL" }, { "venue_id": "mon-jarry-park", "name": "Jarry Park Stadium", "city": "Montreal", "state_or_province": "Quebec", "country": "Canada", "aliases": [ "Parc Jarry" ], "opened_year": 1960, "latitude": 45.53278, "longitude": -73.62694, "coordinate_source": "https://en.wikipedia.org/wiki/Jarry_Park_Stadium", "coordinate_confidence": "published stadium/site point; footprint not surveyed", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Jarry_Park_Stadium", "https://www.baseball-reference.com/teams/WSN/index.shtml" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "mon-jarry-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1976, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 45.53278, "longitude": -73.62694, "source": "https://en.wikipedia.org/wiki/Jarry_Park_Stadium" }, "map_point": { "latitude": 45.53278, "longitude": -73.62694, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Jarry_Park_Stadium" } }, { "venue_id": "mon-olympic-stadium", "name": "Olympic Stadium", "city": "Montreal", "state_or_province": "Quebec", "country": "Canada", "aliases": [], "opened_year": 1976, "latitude": 45.558, "longitude": -73.552, "coordinate_source": "https://en.wikipedia.org/wiki/Olympic_Stadium_(Montreal)", "coordinate_confidence": "published stadium/site point; footprint not surveyed", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Olympic_Stadium_(Montreal)", "https://www.baseball-reference.com/teams/WSN/index.shtml" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "mon-olympic-stadium", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 2004, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 3, "longitude": 3 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified", "coarse_published_component_3_or_fewer_decimals" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 45.558, "longitude": -73.552, "source": "https://en.wikipedia.org/wiki/Olympic_Stadium_(Montreal)" }, "map_point": { "latitude": 45.558, "longitude": -73.552, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Olympic_Stadium_(Montreal)" } }, { "venue_id": "mon-hiram-bithorn", "name": "Hiram Bithorn Stadium", "city": "San Juan", "state_or_province": "Puerto Rico", "country": "Puerto Rico", "aliases": [], "opened_year": 1962, "latitude": 18.41667, "longitude": -66.07306, "coordinate_source": "https://en.wikipedia.org/wiki/Hiram_Bithorn_Stadium", "coordinate_confidence": "published stadium/site point; footprint not surveyed", "site_note": "Temporary Expos home games; not game-by-game.", "sources": [ "https://en.wikipedia.org/wiki/Hiram_Bithorn_Stadium", "https://www.baseball-reference.com/teams/WSN/index.shtml" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "mon-hiram-bithorn", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 2004, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 18.41667, "longitude": -66.07306, "source": "https://en.wikipedia.org/wiki/Hiram_Bithorn_Stadium" }, "map_point": { "latitude": 18.41667, "longitude": -66.07306, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Hiram_Bithorn_Stadium" } }, { "venue_id": "was-rfk-stadium", "name": "Robert F. Kennedy Memorial Stadium", "city": "Washington", "state_or_province": "District of Columbia", "country": "United States", "aliases": [ "D.C. Stadium", "D.C. Stadium / RFK Stadium", "RFK Stadium" ], "opened_year": 1961, "latitude": 38.89, "longitude": -76.9719, "coordinate_source": "https://en.wikipedia.org/wiki/Robert_F._Kennedy_Memorial_Stadium", "coordinate_confidence": "published stadium/site point; footprint not surveyed", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Robert_F._Kennedy_Memorial_Stadium", "https://www.baseball-reference.com/teams/WSN/index.shtml", "https://www.mlb.com/rangers/history/ballparks" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "was-rfk-stadium", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 2007, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 2, "longitude": 4 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified", "coarse_published_component_3_or_fewer_decimals" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 38.89, "longitude": -76.9719, "source": "https://en.wikipedia.org/wiki/Robert_F._Kennedy_Memorial_Stadium" }, "map_point": { "latitude": 38.89, "longitude": -76.9719, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Robert_F._Kennedy_Memorial_Stadium" } }, { "venue_id": "was-nationals-park", "name": "Nationals Park", "city": "Washington", "state_or_province": "District of Columbia", "country": "United States", "aliases": [], "opened_year": 2008, "latitude": 38.87278, "longitude": -77.0075, "coordinate_source": "https://en.wikipedia.org/wiki/Nationals_Park", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Nationals_Park", "https://www.baseball-reference.com/teams/WSN/index.shtml", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "was-nationals-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 4 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 38.87278, "longitude": -77.0075, "source": "https://en.wikipedia.org/wiki/Nationals_Park" }, "map_point": { "latitude": 38.872563, "longitude": -77.007766, "target_type": "inferred foul-line convergence", "status": "Proposed imagery point · not approved for scoring", "sources": [ "https://en.wikipedia.org/wiki/Nationals_Park", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "uncertainty_m": 10, "uncertainty_status": "Analyst estimate, not measured accuracy", "basis": "Foul-line (basepath-strip) convergence in the worn home area (grid read); no distinct dirt circle is visible in this capture. The earlier pick sat ~4 m west, on the third-base strip." }, "coordinate_audit": { "franchise": "WSN", "venue_id": "was-nationals-park", "park_name": "Nationals Park", "city": "Washington", "original_latitude": 38.87278, "original_longitude": -77.0075, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": 38.872567, "proposed_longitude": -77.007809, "proposed_target_type": "home plate", "displacement_m": 35.7, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Esri imagery: home dirt circle identified", "estimated_uncertainty_m": 10, "confidence": "medium-high", "source_urls": [ "https://en.wikipedia.org/wiki/Nationals_Park", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "review_status": "proposed - imagery-read home plate, not surveyed, not approved for scoring", "notes": "" }, "coordinate_correction": { "venue_id": "was-nationals-park", "park_name": "Nationals Park", "status": "corrected proposal - PROPOSED, not approved for scoring", "previous_proposal": { "latitude": 38.872567, "longitude": -77.007809, "displacement_from_published_m": 35.7, "canvas_pixel": [ 525, 742 ], "source": "first package audit / supplement plate_evidence.json (preserved unchanged)" }, "corrected_proposal": { "latitude": 38.872563, "longitude": -77.007766, "displacement_from_published_m": 33.4, "canvas_pixel": [ 541, 744 ], "canvas": "imagery", "canvas_top_left_global_px": [ 38397747, 51355558 ], "point_class": "inferred foul-line convergence" }, "proposal_shift_m": 3.8, "basis": "Foul-line (basepath-strip) convergence in the worn home area (grid read); no distinct dirt circle is visible in this capture. The earlier pick sat ~4 m west, on the third-base strip.", "estimated_uncertainty_m": 10, "after_crop": "after/was-nationals-park_corrected.png", "before_crop": "before/was-nationals-park_before.png" }, "current_franchise": "WSN" }, { "venue_id": "pit-recreation-park", "name": "Recreation Park", "city": "Pittsburgh", "state_or_province": "Pennsylvania", "country": "United States", "aliases": [], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "site_note": "Early Alleghenys home; date boundary uncertain.", "sources": [ "https://www.mlb.com/pirates/history/ballparks" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": null, "longitude": null, "source": null }, "site_id": "pit-recreation-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1890, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "pit-exposition-park", "name": "Exposition Park", "city": "Pittsburgh", "state_or_province": "Pennsylvania", "country": "United States", "aliases": [ "Exposition Park III" ], "opened_year": 1890, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "site_note": "", "sources": [ "https://www.mlb.com/pirates/history/ballparks" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": null, "longitude": null, "source": null }, "site_id": "pit-exposition-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1909, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "pit-forbes-field", "name": "Forbes Field", "city": "Pittsburgh", "state_or_province": "Pennsylvania", "country": "United States", "aliases": [], "opened_year": 1909, "latitude": 40.44194, "longitude": -79.95417, "coordinate_source": "https://en.wikipedia.org/wiki/Forbes_Field", "coordinate_confidence": "published stadium/site point; footprint not surveyed", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Forbes_Field", "https://www.mlb.com/pirates/history/ballparks" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "pit-forbes-field", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1970, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 40.44194, "longitude": -79.95417, "source": "https://en.wikipedia.org/wiki/Forbes_Field" }, "map_point": { "latitude": 40.44194, "longitude": -79.95417, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Forbes_Field" } }, { "venue_id": "pit-three-rivers", "name": "Three Rivers Stadium", "city": "Pittsburgh", "state_or_province": "Pennsylvania", "country": "United States", "aliases": [], "opened_year": 1970, "latitude": 40.44667, "longitude": -80.01278, "coordinate_source": "https://en.wikipedia.org/wiki/Three_Rivers_Stadium", "coordinate_confidence": "published stadium/site point; footprint not surveyed", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Three_Rivers_Stadium", "https://www.mlb.com/pirates/history/ballparks" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "pit-three-rivers", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 2000, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 40.44667, "longitude": -80.01278, "source": "https://en.wikipedia.org/wiki/Three_Rivers_Stadium" }, "map_point": { "latitude": 40.44667, "longitude": -80.01278, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Three_Rivers_Stadium" } }, { "venue_id": "pit-pnc-park", "name": "PNC Park", "city": "Pittsburgh", "state_or_province": "Pennsylvania", "country": "United States", "aliases": [], "opened_year": 2001, "latitude": 40.44694, "longitude": -80.00583, "coordinate_source": "https://en.wikipedia.org/wiki/PNC_Park", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/PNC_Park", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest", "https://www.mlb.com/pirates/history/ballparks" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "pit-pnc-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 40.44694, "longitude": -80.00583, "source": "https://en.wikipedia.org/wiki/PNC_Park" }, "map_point": { "latitude": 40.447084, "longitude": -80.006202, "target_type": "plate-tarp centre (plate covered)", "status": "Proposed imagery point · not approved for scoring", "sources": [ "https://en.wikipedia.org/wiki/PNC_Park", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "uncertainty_m": 10, "uncertainty_status": "Analyst estimate, not measured accuracy", "basis": "Centre of the round home-plate tarp (grid read: disc x 476-528, y 547-593). The earlier pick sat on the tarp's upper-right edge." }, "coordinate_audit": { "franchise": "PIT", "venue_id": "pit-pnc-park", "park_name": "PNC Park", "city": "Pittsburgh", "original_latitude": 40.44694, "original_longitude": -80.00583, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": 40.44711, "proposed_longitude": -80.00618, "proposed_target_type": "home plate", "displacement_m": 35.2, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Esri imagery: home dirt circle identified", "estimated_uncertainty_m": 10, "confidence": "medium-high", "source_urls": [ "https://en.wikipedia.org/wiki/PNC_Park", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "review_status": "proposed - imagery-read home plate, not surveyed, not approved for scoring", "notes": "" }, "coordinate_correction": { "venue_id": "pit-pnc-park", "park_name": "PNC Park", "status": "corrected proposal - PROPOSED, not approved for scoring", "previous_proposal": { "latitude": 40.44711, "longitude": -80.00618, "displacement_from_published_m": 35.2, "canvas_pixel": [ 510, 557 ], "source": "first package audit / supplement plate_evidence.json (preserved unchanged)" }, "corrected_proposal": { "latitude": 40.447084, "longitude": -80.006202, "displacement_from_published_m": 35.3, "canvas_pixel": [ 502, 570 ], "canvas": "imagery", "canvas_top_left_global_px": [ 37279888, 50593155 ], "point_class": "plate-tarp centre (plate covered)" }, "proposal_shift_m": 3.4, "basis": "Centre of the round home-plate tarp (grid read: disc x 476-528, y 547-593). The earlier pick sat on the tarp's upper-right edge.", "estimated_uncertainty_m": 10, "after_crop": "after/pit-pnc-park_corrected.png", "before_crop": "before/pit-pnc-park_before.png" }, "current_franchise": "PIT" }, { "venue_id": "ath-sutter-health-park", "name": "Sutter Health Park", "city": "West Sacramento", "state_or_province": "California", "country": "United States", "aliases": [ "Raley Field", "Sutter Health Park" ], "opened_year": 2000, "latitude": 38.5803722, "longitude": -121.5138, "coordinate_source": "https://en.wikipedia.org/wiki/Sutter_Health_Park", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "Athletics temporary home announced for 2025-27.", "sources": [ "https://en.wikipedia.org/wiki/Sutter_Health_Park", "https://www.mlb.com/athletics/history/ballpark", "https://www.mlb.com/athletics/news/a-s-announce-2025-27-stadium-plans", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "ath-sutter-health-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 7, "longitude": 4 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 38.5803722, "longitude": -121.5138, "source": "https://en.wikipedia.org/wiki/Sutter_Health_Park" }, "map_point": { "latitude": 38.580155, "longitude": -121.514062, "target_type": "dirt-circle centre", "status": "Proposed imagery point · not approved for scoring", "sources": [ "https://en.wikipedia.org/wiki/Sutter_Health_Park", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "uncertainty_m": 10, "uncertainty_status": "Analyst estimate, not measured accuracy", "basis": "Esri imagery: home dirt circle identified (visual grounding + grid check)" }, "coordinate_audit": { "franchise": "ATH", "venue_id": "ath-sutter-health-park", "park_name": "Sutter Health Park", "city": "West Sacramento", "original_latitude": 38.5803722, "original_longitude": -121.5138, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": 38.580155, "proposed_longitude": -121.514062, "proposed_target_type": "home plate", "displacement_m": 33.2, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Esri imagery: home dirt circle identified (visual grounding + grid check)", "estimated_uncertainty_m": 10, "confidence": "medium-high", "source_urls": [ "https://en.wikipedia.org/wiki/Sutter_Health_Park", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "review_status": "proposed - imagery-read home plate, not surveyed, not approved for scoring", "notes": "Temporary Athletics home (from 2025) in West Sacramento; opened 2000 as a minor-league park. Announced Las Vegas park is NOT in use - see findings report." }, "current_franchise": "ATH" }, { "venue_id": "tb-tropicana-field", "name": "Tropicana Field", "city": "St. Petersburg", "state_or_province": "Florida", "country": "United States", "aliases": [ "Florida Suncoast Dome", "The Trop", "ThunderDome", "Trop", "Tropicana Field" ], "opened_year": 1990, "latitude": 27.76833, "longitude": -82.65333, "coordinate_source": "https://en.wikipedia.org/wiki/Tropicana_Field", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "Verified current 2026 Rays home: MLB says return/opening day April 6, 2026.", "sources": [ "https://en.wikipedia.org/wiki/Tropicana_Field", "https://www.mlb.com/news/ballparks-where-the-rays-have-been-the-home-team", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest", "https://www.mlb.com/rays/ballpark/under-the-roof", "https://www.mlb.com/rays/history/ballparks" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "tb-tropicana-field", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 27.76833, "longitude": -82.65333, "source": "https://en.wikipedia.org/wiki/Tropicana_Field" }, "map_point": { "latitude": 27.76833, "longitude": -82.65333, "target_type": "Published site point", "status": "Venue point only · home plate unresolved", "source": "https://en.wikipedia.org/wiki/Tropicana_Field" }, "coordinate_audit": { "franchise": "TBR", "venue_id": "tb-tropicana-field", "park_name": "Tropicana Field", "city": "St. Petersburg", "original_latitude": 27.76833, "original_longitude": -82.65333, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": null, "proposed_longitude": null, "proposed_target_type": "none - unresolved", "displacement_m": null, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed; Bing Maps aerial tiles (zoom 19) as second source", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Fixed fabric dome; home plate is never visible in aerial imagery. Esri and Bing both show the closed dome.", "estimated_uncertainty_m": null, "confidence": "unresolved", "source_urls": [ "https://en.wikipedia.org/wiki/Tropicana_Field", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer", "https://www.bing.com/maps (aerial tile service)" ], "review_status": "unresolved - do not use as home plate", "notes": "Fixed dome: no aerial source can show the plate. Original published point retained as a venue point only. See findings report for the recommended non-aerial route (georeferenced seating/field plan)." }, "current_franchise": "TBR" }, { "venue_id": "tb-steinbrenner-field", "name": "George M. Steinbrenner Field", "city": "Tampa", "state_or_province": "Florida", "country": "United States", "aliases": [ "George M. Steinbrenner Field", "Steinbrenner Field" ], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "site_note": "Rays temporary 2025 home while Tropicana Field was repaired.", "sources": [ "https://en.wikipedia.org/wiki/George_M._Steinbrenner_Field", "https://www.mlb.com/news/ballparks-where-the-rays-have-been-the-home-team", "https://www.mlb.com/news/rays-2025-steinbrenner-field", "https://www.mlb.com/rays/ballpark/under-the-roof" ], "uncertainties": [ "Coordinates, demolition year, and current site use were not pursued in this continuation." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": null, "longitude": null, "source": null }, "site_id": "tb-steinbrenner-field", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 2025, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "cubs-23rd-street-grounds", "name": "23rd Street Grounds", "city": "Chicago", "state_or_province": "Illinois", "country": "United States", "aliases": [], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "site_note": "", "sources": [ "https://www.mlb.com/cubs/history/ballparks" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": null, "longitude": null, "source": null }, "site_id": "cubs-23rd-street-grounds", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1877, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "cubs-lakefront-park", "name": "Lakefront Park", "city": "Chicago", "state_or_province": "Illinois", "country": "United States", "aliases": [], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "site_note": "", "sources": [ "https://www.mlb.com/cubs/history/ballparks" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": null, "longitude": null, "source": null }, "site_id": "cubs-lakefront-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1884, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "cubs-west-side-park-1", "name": "West Side Park", "city": "Chicago", "state_or_province": "Illinois", "country": "United States", "aliases": [], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "site_note": "", "sources": [ "https://www.mlb.com/cubs/history/ballparks" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": null, "longitude": null, "source": null }, "site_id": "cubs-west-side-park-1", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1891, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "cubs-south-side-park", "name": "South Side Park", "city": "Chicago", "state_or_province": "Illinois", "country": "United States", "aliases": [], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "site_note": "", "sources": [ "https://www.mlb.com/cubs/history/ballparks" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": null, "longitude": null, "source": null }, "site_id": "cubs-south-side-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1893, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "cubs-west-side-grounds", "name": "West Side Grounds", "city": "Chicago", "state_or_province": "Illinois", "country": "United States", "aliases": [], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "site_note": "", "sources": [ "https://www.mlb.com/cubs/history/ballparks" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": null, "longitude": null, "source": null }, "site_id": "cubs-west-side-grounds", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1915, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "cubs-wrigley-field", "name": "Wrigley Field", "city": "Chicago", "state_or_province": "Illinois", "country": "United States", "aliases": [ "Weeghman Park", "Cubs Park" ], "opened_year": 1914, "latitude": 41.94806, "longitude": -87.65556, "coordinate_source": "https://en.wikipedia.org/wiki/Wrigley_Field", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Wrigley_Field", "https://www.mlb.com/cubs/history/ballparks", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "cubs-wrigley-field", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 41.94806, "longitude": -87.65556, "source": "https://en.wikipedia.org/wiki/Wrigley_Field" }, "map_point": { "latitude": 41.947881, "longitude": -87.655846, "target_type": "dirt-circle centre", "status": "Proposed imagery point · not approved for scoring", "sources": [ "https://en.wikipedia.org/wiki/Wrigley_Field", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "uncertainty_m": 10, "uncertainty_status": "Analyst estimate, not measured accuracy", "basis": "Esri imagery: home dirt circle identified" }, "coordinate_audit": { "franchise": "CHC", "venue_id": "cubs-wrigley-field", "park_name": "Wrigley Field", "city": "Chicago", "original_latitude": 41.94806, "original_longitude": -87.65556, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": 41.947881, "proposed_longitude": -87.655846, "proposed_target_type": "home plate", "displacement_m": 30.9, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Esri imagery: home dirt circle identified", "estimated_uncertainty_m": 10, "confidence": "medium-high", "source_urls": [ "https://en.wikipedia.org/wiki/Wrigley_Field", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "review_status": "proposed - imagery-read home plate, not surveyed, not approved for scoring", "notes": "" }, "current_franchise": "CHC" }, { "venue_id": "sox-south-side-grounds", "name": "South Side Grounds", "city": "Chicago", "state_or_province": "Illinois", "country": "United States", "aliases": [ "39th Street Grounds" ], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "site_note": "", "sources": [ "https://www.mlb.com/whitesox/ballpark/information/history-and-dimensions" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": null, "longitude": null, "source": null }, "site_id": "sox-south-side-grounds", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1910, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "sox-comiskey-park", "name": "Comiskey Park", "city": "Chicago", "state_or_province": "Illinois", "country": "United States", "aliases": [ "White Sox Park", "Old Comiskey Park" ], "opened_year": 1910, "latitude": 41.83167, "longitude": -87.63417, "coordinate_source": "https://en.wikipedia.org/wiki/Comiskey_Park", "coordinate_confidence": "published stadium/site point; footprint not surveyed", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Comiskey_Park", "https://www.mlb.com/whitesox/ballpark/information/history-and-dimensions" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "sox-comiskey-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1990, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 41.83167, "longitude": -87.63417, "source": "https://en.wikipedia.org/wiki/Comiskey_Park" }, "map_point": { "latitude": 41.83167, "longitude": -87.63417, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Comiskey_Park" } }, { "venue_id": "sox-rate-field", "name": "Rate Field", "city": "Chicago", "state_or_province": "Illinois", "country": "United States", "aliases": [ "New Comiskey Park", "U.S. Cellular Field", "Guaranteed Rate Field" ], "opened_year": 1991, "latitude": 41.83, "longitude": -87.63389, "coordinate_source": "https://en.wikipedia.org/wiki/Rate_Field", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Rate_Field", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest", "https://www.mlb.com/whitesox/ballpark/information/history-and-dimensions" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "sox-rate-field", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 2, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified", "coarse_published_component_3_or_fewer_decimals" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 41.83, "longitude": -87.63389, "source": "https://en.wikipedia.org/wiki/Rate_Field" }, "map_point": { "latitude": 41.830177, "longitude": -87.634241, "target_type": "plate-tarp centre (plate covered)", "status": "Proposed imagery point · not approved for scoring", "sources": [ "https://en.wikipedia.org/wiki/Rate_Field", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer", "https://www.bing.com/maps (aerial tile service)" ], "uncertainty_m": 12, "uncertainty_status": "Analyst estimate, not measured accuracy", "basis": "Centre of the round home-plate tarp on the Bing capture (grid read: disc x 477-543, y 524-579). The earlier convergence pick sat at the tarp's upper-left edge." }, "coordinate_audit": { "franchise": "CWS", "venue_id": "sox-rate-field", "park_name": "Rate Field", "city": "Chicago", "original_latitude": 41.83, "original_longitude": -87.63389, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": 41.830207, "proposed_longitude": -87.634273, "proposed_target_type": "home plate", "displacement_m": 39.2, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed; Bing Maps aerial tiles (zoom 19) as second source", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Plate occluded by tarp in Esri (winter, 'Guaranteed Rate Field' roof signage = pre-2025 imagery) and Bing imagery; point from foul-line convergence in Bing image + grounding consensus on Esri image", "estimated_uncertainty_m": 12, "confidence": "medium", "source_urls": [ "https://en.wikipedia.org/wiki/Rate_Field", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer", "https://www.bing.com/maps (aerial tile service)" ], "review_status": "proposed - imagery-read home plate, not surveyed, not approved for scoring", "notes": "One of the four flagged parks. Original latitude had only 2 decimal places. Plate itself is tarp-covered in both imagery sources; point derives from foul-line convergence. Esri image predates the 2025 'Rate Field' name (roof signage reads 'Guaranteed Rate Field')." }, "coordinate_correction": { "venue_id": "sox-rate-field", "park_name": "Rate Field", "status": "corrected proposal - PROPOSED, not approved for scoring", "previous_proposal": { "latitude": 41.830207, "longitude": -87.634273, "displacement_from_published_m": 39.2, "canvas_pixel": [ 498, 537 ], "source": "first package audit / supplement plate_evidence.json (preserved unchanged)" }, "corrected_proposal": { "latitude": 41.830177, "longitude": -87.634241, "displacement_from_published_m": 35.1, "canvas_pixel": [ 510, 552 ], "canvas": "imagery_bing", "canvas_top_left_global_px": [ 34435941, 49908440 ], "point_class": "plate-tarp centre (plate covered)" }, "proposal_shift_m": 4.3, "basis": "Centre of the round home-plate tarp on the Bing capture (grid read: disc x 477-543, y 524-579). The earlier convergence pick sat at the tarp's upper-left edge.", "estimated_uncertainty_m": 12, "after_crop": "after/sox-rate-field_corrected.png", "before_crop": "before/sox-rate-field_before.png" }, "current_franchise": "CWS" }, { "venue_id": "cleveland-league-park", "name": "League Park", "city": "Cleveland", "state_or_province": "Ohio", "country": "United States", "aliases": [], "opened_year": 1891, "latitude": 41.51139, "longitude": -81.64417, "coordinate_source": "https://en.wikipedia.org/wiki/League_Park", "coordinate_confidence": "published stadium/site point; footprint not surveyed", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/League_Park", "https://www.mlb.com/guardians/history/ballparks" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "cleveland-league-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1946, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 41.51139, "longitude": -81.64417, "source": "https://en.wikipedia.org/wiki/League_Park" }, "map_point": { "latitude": 41.51139, "longitude": -81.64417, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/League_Park" } }, { "venue_id": "cleveland-stadium", "name": "Cleveland Stadium", "city": "Cleveland", "state_or_province": "Ohio", "country": "United States", "aliases": [], "opened_year": 1932, "latitude": 41.50667, "longitude": -81.69722, "coordinate_source": "https://en.wikipedia.org/wiki/Cleveland_Stadium", "coordinate_confidence": "published stadium/site point; footprint not surveyed", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Cleveland_Stadium", "https://www.mlb.com/guardians/history/ballparks" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "cleveland-stadium", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1993, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 41.50667, "longitude": -81.69722, "source": "https://en.wikipedia.org/wiki/Cleveland_Stadium" }, "map_point": { "latitude": 41.50667, "longitude": -81.69722, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Cleveland_Stadium" } }, { "venue_id": "cleveland-progressive-field", "name": "Progressive Field", "city": "Cleveland", "state_or_province": "Ohio", "country": "United States", "aliases": [ "Jacobs Field" ], "opened_year": 1994, "latitude": 41.49583, "longitude": -81.68528, "coordinate_source": "https://en.wikipedia.org/wiki/Progressive_Field", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Progressive_Field", "https://www.mlb.com/guardians/history/ballparks", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "cleveland-progressive-field", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 41.49583, "longitude": -81.68528, "source": "https://en.wikipedia.org/wiki/Progressive_Field" }, "map_point": { "latitude": 41.495574, "longitude": -81.685297, "target_type": "dirt-circle centre", "status": "Proposed imagery point · not approved for scoring", "sources": [ "https://en.wikipedia.org/wiki/Progressive_Field", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "uncertainty_m": 10, "uncertainty_status": "Analyst estimate, not measured accuracy", "basis": "Esri imagery: home dirt circle identified" }, "coordinate_audit": { "franchise": "CLE", "venue_id": "cleveland-progressive-field", "park_name": "Progressive Field", "city": "Cleveland", "original_latitude": 41.49583, "original_longitude": -81.68528, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": 41.495574, "proposed_longitude": -81.685297, "proposed_target_type": "home plate", "displacement_m": 28.5, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Esri imagery: home dirt circle identified", "estimated_uncertainty_m": 10, "confidence": "medium-high", "source_urls": [ "https://en.wikipedia.org/wiki/Progressive_Field", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "review_status": "proposed - imagery-read home plate, not surveyed, not approved for scoring", "notes": "" }, "current_franchise": "CLE" }, { "venue_id": "detroit-bennett-park", "name": "Bennett Park", "city": "Detroit", "state_or_province": "Michigan", "country": "United States", "aliases": [], "opened_year": 1896, "latitude": 42.33222, "longitude": -83.06806, "coordinate_source": "https://en.wikipedia.org/wiki/Bennett_Park_(Detroit)", "coordinate_confidence": "published stadium/site point; footprint not surveyed", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Bennett_Park_(Detroit)", "https://www.mlb.com/tigers/history/ballparks" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "detroit-bennett-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1911, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 42.33222, "longitude": -83.06806, "source": "https://en.wikipedia.org/wiki/Bennett_Park_(Detroit)" }, "map_point": { "latitude": 42.33222, "longitude": -83.06806, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Bennett_Park_(Detroit)" } }, { "venue_id": "detroit-tiger-stadium", "name": "Tiger Stadium", "city": "Detroit", "state_or_province": "Michigan", "country": "United States", "aliases": [ "Briggs Stadium", "Navin Field", "Tiger Stadium", "Navin Field", "Briggs Stadium" ], "opened_year": 1912, "latitude": 42.33194, "longitude": -83.06889, "coordinate_source": "https://en.wikipedia.org/wiki/Tiger_Stadium_(Detroit)", "coordinate_confidence": "published stadium/site point; footprint not surveyed", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Tiger_Stadium_(Detroit)", "https://www.mlb.com/tigers/history/ballparks" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass.", "Renamed Briggs Stadium in 1938 and Tiger Stadium in 1961; these are not new physical venues." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "detroit-tiger-stadium", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1999, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 42.33194, "longitude": -83.06889, "source": "https://en.wikipedia.org/wiki/Tiger_Stadium_(Detroit)" }, "map_point": { "latitude": 42.33194, "longitude": -83.06889, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Tiger_Stadium_(Detroit)" } }, { "venue_id": "detroit-comerica-park", "name": "Comerica Park", "city": "Detroit", "state_or_province": "Michigan", "country": "United States", "aliases": [], "opened_year": 2000, "latitude": 42.33917, "longitude": -83.04861, "coordinate_source": "https://en.wikipedia.org/wiki/Comerica_Park", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Comerica_Park", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest", "https://www.mlb.com/tigers/history/ballparks" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "detroit-comerica-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 42.33917, "longitude": -83.04861, "source": "https://en.wikipedia.org/wiki/Comerica_Park" }, "map_point": { "latitude": 42.339437, "longitude": -83.048988, "target_type": "actual home plate (dirt cutout)", "status": "Proposed imagery point · not approved for scoring", "sources": [ "https://en.wikipedia.org/wiki/Comerica_Park", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "uncertainty_m": 10, "uncertainty_status": "Analyst estimate, not measured accuracy", "basis": "Esri imagery: home dirt circle identified" }, "coordinate_audit": { "franchise": "DET", "venue_id": "detroit-comerica-park", "park_name": "Comerica Park", "city": "Detroit", "original_latitude": 42.33917, "original_longitude": -83.04861, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": 42.339437, "proposed_longitude": -83.048988, "proposed_target_type": "home plate", "displacement_m": 43.0, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Esri imagery: home dirt circle identified", "estimated_uncertainty_m": 10, "confidence": "medium-high", "source_urls": [ "https://en.wikipedia.org/wiki/Comerica_Park", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "review_status": "proposed - imagery-read home plate, not surveyed, not approved for scoring", "notes": "" }, "current_franchise": "DET" }, { "venue_id": "kc-municipal-stadium", "name": "Municipal Stadium", "city": "Kansas City", "state_or_province": "Missouri", "country": "United States", "aliases": [ "Blues Stadium", "Kansas City Municipal Stadium", "Municipal Stadium" ], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Municipal_Stadium_(Kansas_City,_Missouri)", "https://www.mlb.com/athletics/history/ballpark", "https://www.mlb.com/royals/history/ballparks" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": null, "longitude": null, "source": null }, "site_id": "kc-municipal-stadium", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1972, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "kc-kauffman-stadium", "name": "Kauffman Stadium", "city": "Kansas City", "state_or_province": "Missouri", "country": "United States", "aliases": [ "Royals Stadium" ], "opened_year": 1973, "latitude": 39.0514, "longitude": -94.4806, "coordinate_source": "https://en.wikipedia.org/wiki/Kauffman_Stadium", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Kauffman_Stadium", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest", "https://www.mlb.com/royals/history/ballparks" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "kc-kauffman-stadium", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 4, "longitude": 4 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 39.0514, "longitude": -94.4806, "source": "https://en.wikipedia.org/wiki/Kauffman_Stadium" }, "map_point": { "latitude": 39.05125, "longitude": -94.480842, "target_type": "plate-tarp centre (plate covered)", "status": "Proposed imagery point · not approved for scoring", "sources": [ "https://en.wikipedia.org/wiki/Kauffman_Stadium", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "uncertainty_m": 10, "uncertainty_status": "Analyst estimate, not measured accuracy", "basis": "Centre of the round home-plate tarp on a clean Bing capture (grid read: disc x 508-562, y 945-998); both basepath strips run from the tarp centre. The Esri capture used originally is visibly distorted (non-orthorectified warp) with the home area in shadow, and the earlier read on it was ~10 m off the tarp centre." }, "coordinate_audit": { "franchise": "KCR", "venue_id": "kc-kauffman-stadium", "park_name": "Kauffman Stadium", "city": "Kansas City", "original_latitude": 39.0514, "original_longitude": -94.4806, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": 39.0513, "proposed_longitude": -94.480745, "proposed_target_type": "home plate", "displacement_m": 16.8, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Esri imagery: home dirt circle identified", "estimated_uncertainty_m": 10, "confidence": "medium-high", "source_urls": [ "https://en.wikipedia.org/wiki/Kauffman_Stadium", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "review_status": "proposed - imagery-read home plate, not surveyed, not approved for scoring", "notes": "" }, "coordinate_correction": { "venue_id": "kc-kauffman-stadium", "park_name": "Kauffman Stadium", "status": "corrected proposal - PROPOSED, not approved for scoring", "previous_proposal": { "latitude": 39.0513, "longitude": -94.480745, "displacement_from_published_m": 16.8, "canvas_pixel": [ 586, 689 ], "source": "first package audit / supplement plate_evidence.json (preserved unchanged)" }, "corrected_proposal": { "latitude": 39.05125, "longitude": -94.480842, "displacement_from_published_m": 26.8, "canvas_pixel": [ 535, 972 ], "canvas": "imagery_bing", "canvas_top_left_global_px": [ 31883318, 51269653 ], "point_class": "plate-tarp centre (plate covered) - second capture" }, "proposal_shift_m": 10.1, "basis": "Centre of the round home-plate tarp on a clean Bing capture (grid read: disc x 508-562, y 945-998); both basepath strips run from the tarp centre. The Esri capture used originally is visibly distorted (non-orthorectified warp) with the home area in shadow, and the earlier read on it was ~10 m off the tarp centre.", "estimated_uncertainty_m": 10, "after_crop": "after/kc-kauffman-stadium_corrected.png", "before_crop": "before/kc-kauffman-stadium_before.png" }, "current_franchise": "KCR" }, { "venue_id": "dc-american-league-park", "name": "American League Park", "city": "Washington", "state_or_province": "District of Columbia", "country": "United States", "aliases": [], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "site_note": "", "sources": [ "https://www.mlb.com/twins/history/ballparks" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": null, "longitude": null, "source": null }, "site_id": "dc-american-league-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1904, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "dc-national-park", "name": "National Park", "city": "Washington", "state_or_province": "District of Columbia", "country": "United States", "aliases": [ "American League Park" ], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "site_note": "", "sources": [ "https://www.mlb.com/twins/history/ballparks" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "site_id": "washington-griffith-parcel", "proposed_coordinates_unverified": { "latitude": null, "longitude": null, "source": null }, "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1910, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "dc-griffith-stadium", "name": "Griffith Stadium", "city": "Washington", "state_or_province": "District of Columbia", "country": "United States", "aliases": [ "Griffith Stadium", "National Park" ], "opened_year": 1911, "latitude": 38.9175, "longitude": -77.02028, "coordinate_source": "https://en.wikipedia.org/wiki/Griffith_Stadium", "coordinate_confidence": "published stadium/site point; footprint not surveyed", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Griffith_Stadium", "https://www.mlb.com/rangers/history/ballparks", "https://www.mlb.com/twins/history/ballparks" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "washington-griffith-parcel", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1961, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 4, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 38.9175, "longitude": -77.02028, "source": "https://en.wikipedia.org/wiki/Griffith_Stadium" }, "map_point": { "latitude": 38.9175, "longitude": -77.02028, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Griffith_Stadium" } }, { "venue_id": "min-metropolitan-stadium", "name": "Metropolitan Stadium", "city": "Bloomington", "state_or_province": "Minnesota", "country": "United States", "aliases": [], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "site_note": "", "sources": [ "https://www.mlb.com/twins/history/ballparks" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": null, "longitude": null, "source": null }, "site_id": "min-metropolitan-stadium", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1981, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "min-metrodome", "name": "Hubert H. Humphrey Metrodome", "city": "Minneapolis", "state_or_province": "Minnesota", "country": "United States", "aliases": [], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "site_note": "", "sources": [ "https://www.mlb.com/twins/history/ballparks" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": null, "longitude": null, "source": null }, "site_id": "min-metrodome", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 2009, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "min-target-field", "name": "Target Field", "city": "Minneapolis", "state_or_province": "Minnesota", "country": "United States", "aliases": [], "opened_year": 2010, "latitude": 44.98167, "longitude": -93.27833, "coordinate_source": "https://en.wikipedia.org/wiki/Target_Field", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Target_Field", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest", "https://www.mlb.com/twins/history/ballparks" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "min-target-field", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 44.98167, "longitude": -93.27833, "source": "https://en.wikipedia.org/wiki/Target_Field" }, "map_point": { "latitude": 44.981705, "longitude": -93.278386, "target_type": "dirt-circle centre (snow-covered)", "status": "Proposed imagery point · not approved for scoring", "sources": [ "https://en.wikipedia.org/wiki/Target_Field", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "uncertainty_m": 10, "uncertainty_status": "Analyst estimate, not measured accuracy", "basis": "Esri imagery: home dirt circle identified" }, "coordinate_audit": { "franchise": "MIN", "venue_id": "min-target-field", "park_name": "Target Field", "city": "Minneapolis", "original_latitude": 44.98167, "original_longitude": -93.27833, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": 44.981705, "proposed_longitude": -93.278386, "proposed_target_type": "home plate", "displacement_m": 5.9, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Esri imagery: home dirt circle identified", "estimated_uncertainty_m": 10, "confidence": "medium-high", "source_urls": [ "https://en.wikipedia.org/wiki/Target_Field", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "review_status": "proposed - imagery-read home plate, not surveyed, not approved for scoring", "notes": "" }, "current_franchise": "MIN" }, { "venue_id": "sea-sicks-stadium", "name": "Sick's Stadium", "city": "Seattle", "state_or_province": "Washington", "country": "United States", "aliases": [], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "site_note": "", "sources": [ "https://www.mlb.com/brewers/history/ballparks" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": null, "longitude": null, "source": null }, "site_id": "sea-sicks-stadium", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1969, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "mil-american-family-field", "name": "American Family Field", "city": "Milwaukee", "state_or_province": "Wisconsin", "country": "United States", "aliases": [ "Miller Park" ], "opened_year": 2001, "latitude": 43.02833, "longitude": -87.97111, "coordinate_source": "https://en.wikipedia.org/wiki/American_Family_Field", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/American_Family_Field", "https://www.mlb.com/brewers/history/ballparks", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "mil-american-family-field", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 43.02833, "longitude": -87.97111, "source": "https://en.wikipedia.org/wiki/American_Family_Field" }, "map_point": { "latitude": 43.02841, "longitude": -87.97163, "target_type": "plate-tarp centre (plate covered, in shadow)", "status": "Proposed imagery point · not approved for scoring", "sources": [ "https://en.wikipedia.org/wiki/American_Family_Field", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer", "https://www.bing.com/maps (aerial tile service)" ], "uncertainty_m": 12, "uncertainty_status": "Analyst estimate, not measured accuracy", "basis": "Esri imagery (fan roof partly open; home area in roof shadow, field tarped) and Bing aerial agree within ~9 m; point is consensus of the two reads" }, "coordinate_audit": { "franchise": "MIL", "venue_id": "mil-american-family-field", "park_name": "American Family Field", "city": "Milwaukee", "original_latitude": 43.02833, "original_longitude": -87.97111, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": 43.02841, "proposed_longitude": -87.97163, "proposed_target_type": "home plate", "displacement_m": 43.2, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed; Bing Maps aerial tiles (zoom 19) as second source", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Esri imagery (fan roof partly open; home area in roof shadow, field tarped) and Bing aerial agree within ~9 m; point is consensus of the two reads", "estimated_uncertainty_m": 12, "confidence": "medium", "source_urls": [ "https://en.wikipedia.org/wiki/American_Family_Field", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer", "https://www.bing.com/maps (aerial tile service)" ], "review_status": "proposed - imagery-read home plate, not surveyed, not approved for scoring", "notes": "Fan-style retractable roof partly open; home area in roof shadow and field tarped in Esri image. Two independent imagery reads agree within ~9 m." }, "current_franchise": "MIL" }, { "venue_id": "stl-robison-field", "name": "Robison Field", "city": "St. Louis", "state_or_province": "Missouri", "country": "United States", "aliases": [ "League Park" ], "opened_year": 1893, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "site_note": "", "sources": [ "https://www.mlb.com/cardinals/history/ballparks" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": null, "longitude": null, "source": null }, "site_id": "stl-robison-field", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1920, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "stl-busch-memorial", "name": "Busch Memorial Stadium", "city": "St. Louis", "state_or_province": "Missouri", "country": "United States", "aliases": [ "Busch Stadium II" ], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "site_note": "", "sources": [ "https://www.mlb.com/cardinals/history/ballparks" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": null, "longitude": null, "source": null }, "site_id": "stl-busch-memorial", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 2005, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "stl-busch-stadium-iii", "name": "Busch Stadium", "city": "St. Louis", "state_or_province": "Missouri", "country": "United States", "aliases": [ "Busch Stadium III" ], "opened_year": 2006, "latitude": 38.6225, "longitude": -90.19306, "coordinate_source": "https://en.wikipedia.org/wiki/Busch_Stadium", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Busch_Stadium", "https://www.mlb.com/cardinals/history/ballparks", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "stl-busch-stadium-iii", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 4, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 38.6225, "longitude": -90.19306, "source": "https://en.wikipedia.org/wiki/Busch_Stadium" }, "map_point": { "latitude": 38.622418, "longitude": -90.193422, "target_type": "dirt-circle centre", "status": "Proposed imagery point · not approved for scoring", "sources": [ "https://en.wikipedia.org/wiki/Busch_Stadium", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "uncertainty_m": 10, "uncertainty_status": "Analyst estimate, not measured accuracy", "basis": "Centre of the home dirt circle (grid read from the circle's arc: x 477-532, y 660-701); basepath-strip convergence agrees within ~2 m. The earlier pick sat on the circle's rim where the strip joins." }, "coordinate_audit": { "franchise": "STL", "venue_id": "stl-busch-stadium-iii", "park_name": "Busch Stadium", "city": "St. Louis", "original_latitude": 38.6225, "original_longitude": -90.19306, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": 38.622445, "proposed_longitude": -90.193403, "proposed_target_type": "home plate", "displacement_m": 30.5, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Esri imagery: home dirt circle identified", "estimated_uncertainty_m": 10, "confidence": "medium-high", "source_urls": [ "https://en.wikipedia.org/wiki/Busch_Stadium", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "review_status": "proposed - imagery-read home plate, not surveyed, not approved for scoring", "notes": "" }, "coordinate_correction": { "venue_id": "stl-busch-stadium-iii", "park_name": "Busch Stadium", "status": "corrected proposal - PROPOSED, not approved for scoring", "previous_proposal": { "latitude": 38.622445, "longitude": -90.193403, "displacement_from_published_m": 30.5, "canvas_pixel": [ 512, 667 ], "source": "first package audit / supplement plate_evidence.json (preserved unchanged)" }, "corrected_proposal": { "latitude": 38.622418, "longitude": -90.193422, "displacement_from_published_m": 32.8, "canvas_pixel": [ 505, 680 ], "canvas": "imagery", "canvas_top_left_global_px": [ 33481814, 51475201 ], "point_class": "dirt-circle centre" }, "proposal_shift_m": 3.5, "basis": "Centre of the home dirt circle (grid read from the circle's arc: x 477-532, y 660-701); basepath-strip convergence agrees within ~2 m. The earlier pick sat on the circle's rim where the strip joins.", "estimated_uncertainty_m": 10, "after_crop": "after/stl-busch-stadium-iii_corrected.png", "before_crop": "before/stl-busch-stadium-iii_before.png" }, "current_franchise": "STL" }, { "venue_id": "arlington-stadium", "name": "Arlington Stadium", "city": "Arlington", "state_or_province": "Texas", "country": "United States", "aliases": [], "opened_year": 1965, "latitude": 32.75639, "longitude": -97.08472, "coordinate_source": "https://en.wikipedia.org/wiki/Arlington_Stadium", "coordinate_confidence": "published stadium/site point; footprint not surveyed", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Arlington_Stadium", "https://www.mlb.com/rangers/history/ballparks" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "arlington-stadium", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1993, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 32.75639, "longitude": -97.08472, "source": "https://en.wikipedia.org/wiki/Arlington_Stadium" }, "map_point": { "latitude": 32.75639, "longitude": -97.08472, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Arlington_Stadium" } }, { "venue_id": "rangers-ballpark-arlington", "name": "The Ballpark in Arlington", "city": "Arlington", "state_or_province": "Texas", "country": "United States", "aliases": [ "Globe Life Park in Arlington", "Ameriquest Field", "Rangers Ballpark" ], "opened_year": 1994, "latitude": 32.75139, "longitude": -97.08278, "coordinate_source": "https://en.wikipedia.org/wiki/Globe_Life_Park_in_Arlington", "coordinate_confidence": "published stadium/site point; footprint not surveyed", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Globe_Life_Park_in_Arlington", "https://www.mlb.com/rangers/history/ballparks" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "rangers-ballpark-arlington", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 2019, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 32.75139, "longitude": -97.08278, "source": "https://en.wikipedia.org/wiki/Globe_Life_Park_in_Arlington" }, "map_point": { "latitude": 32.75139, "longitude": -97.08278, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Globe_Life_Park_in_Arlington" } }, { "venue_id": "rangers-globe-life-field", "name": "Globe Life Field", "city": "Arlington", "state_or_province": "Texas", "country": "United States", "aliases": [], "opened_year": 2020, "latitude": 32.7475, "longitude": -97.08417, "coordinate_source": "https://en.wikipedia.org/wiki/Globe_Life_Field", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Globe_Life_Field", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest", "https://www.mlb.com/rangers/history/ballparks" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "rangers-globe-life-field", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 4, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 32.7475, "longitude": -97.08417, "source": "https://en.wikipedia.org/wiki/Globe_Life_Field" }, "map_point": { "latitude": 32.7475, "longitude": -97.08417, "target_type": "Published site point", "status": "Venue point only · home plate unresolved", "source": "https://en.wikipedia.org/wiki/Globe_Life_Field" }, "coordinate_audit": { "franchise": "TEX", "venue_id": "rangers-globe-life-field", "park_name": "Globe Life Field", "city": "Arlington", "original_latitude": 32.7475, "original_longitude": -97.08417, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": null, "proposed_longitude": null, "proposed_target_type": "none - unresolved", "displacement_m": null, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed; Bing Maps aerial tiles (zoom 19) as second source", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Roof closed in both Esri World Imagery and Bing aerial; home plate not identifiable from aerial imagery.", "estimated_uncertainty_m": null, "confidence": "unresolved", "source_urls": [ "https://en.wikipedia.org/wiki/Globe_Life_Field", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer", "https://www.bing.com/maps (aerial tile service)" ], "review_status": "unresolved - do not use as home plate", "notes": "Retractable roof closed in both available aerial sources. Original published point retained as a venue point only." }, "current_franchise": "TEX" }, { "venue_id": "hou-colt-stadium", "name": "Colt Stadium", "city": "Houston", "state_or_province": "Texas", "country": "United States", "aliases": [], "opened_year": 1962, "latitude": 29.6883, "longitude": -95.4086, "coordinate_source": "https://en.wikipedia.org/wiki/Colt_Stadium", "coordinate_confidence": "published stadium/site point; footprint not surveyed", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Colt_Stadium", "https://www.mlb.com/astros/team/jobs/our-history" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "hou-colt-stadium", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1964, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 4, "longitude": 4 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 29.6883, "longitude": -95.4086, "source": "https://en.wikipedia.org/wiki/Colt_Stadium" }, "map_point": { "latitude": 29.6883, "longitude": -95.4086, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Colt_Stadium" } }, { "venue_id": "hou-astrodome", "name": "Astrodome", "city": "Houston", "state_or_province": "Texas", "country": "United States", "aliases": [ "Harris County Domed Stadium" ], "opened_year": 1965, "latitude": 29.685, "longitude": -95.40778, "coordinate_source": "https://en.wikipedia.org/wiki/Astrodome", "coordinate_confidence": "published stadium/site point; footprint not surveyed", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Astrodome", "https://www.mlb.com/astros/team/jobs/our-history" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "hou-astrodome", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1999, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 3, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified", "coarse_published_component_3_or_fewer_decimals" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 29.685, "longitude": -95.40778, "source": "https://en.wikipedia.org/wiki/Astrodome" }, "map_point": { "latitude": 29.685, "longitude": -95.40778, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Astrodome" } }, { "venue_id": "hou-minute-maid-park", "name": "Daikin Park", "city": "Houston", "state_or_province": "Texas", "country": "United States", "aliases": [ "Enron Field", "Astros Field" ], "opened_year": 2000, "latitude": 29.75694, "longitude": -95.35556, "coordinate_source": "https://en.wikipedia.org/wiki/Daikin_Park", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "", "sources": [ "https://en.wikipedia.org/wiki/Daikin_Park", "https://www.mlb.com/astros/ballpark/information/facts-and-figures", "https://www.mlb.com/astros/team/jobs/our-history", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest" ], "uncertainties": [ "Coordinates and demolition/site-use details were not established in this pass." ], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "hou-minute-maid-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "timeline_label": "Enron Field / Astros Field / Minute Maid Park / Daikin Park (name varies by year)", "published_point": { "latitude": 29.75694, "longitude": -95.35556, "source": "https://en.wikipedia.org/wiki/Daikin_Park" }, "map_point": { "latitude": 29.756668, "longitude": -95.355363, "target_type": "actual home plate (dirt cutout apex)", "status": "Proposed imagery point · not approved for scoring", "sources": [ "https://en.wikipedia.org/wiki/Daikin_Park", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "uncertainty_m": 10, "uncertainty_status": "Analyst estimate, not measured accuracy", "basis": "Back point of the light home-plate dirt cutout where the foul lines meet (grid read). The earlier 'south vertex' pick overshot the vertex by ~8 m onto the warning track." }, "coordinate_audit": { "franchise": "HOU", "venue_id": "hou-minute-maid-park", "park_name": "Daikin Park", "city": "Houston", "original_latitude": 29.75694, "original_longitude": -95.35556, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": 29.756596, "proposed_longitude": -95.355368, "proposed_target_type": "home plate", "displacement_m": 42.5, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Esri imagery (retractable roof open, 'DAIKIN PARK' roof panel visible): diamond south vertex; automated point read the mound/star at square center and was corrected by diamond geometry", "estimated_uncertainty_m": 10, "confidence": "medium-high", "source_urls": [ "https://en.wikipedia.org/wiki/Daikin_Park", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "review_status": "proposed - imagery-read home plate, not surveyed, not approved for scoring", "notes": "Venue renamed Daikin Park (2025). Retractable roof is open in Esri imagery with the roof panel parked NE, so the field is fully visible." }, "coordinate_correction": { "venue_id": "hou-minute-maid-park", "park_name": "Daikin Park", "status": "corrected proposal - PROPOSED, not approved for scoring", "previous_proposal": { "latitude": 29.756596, "longitude": -95.355368, "displacement_from_published_m": 42.5, "canvas_pixel": [ 712, 788 ], "source": "first package audit / supplement plate_evidence.json (preserved unchanged)" }, "corrected_proposal": { "latitude": 29.756668, "longitude": -95.355363, "displacement_from_published_m": 35.7, "canvas_pixel": [ 714, 757 ], "canvas": "imagery", "canvas_top_left_global_px": [ 31557094, 55478778 ], "point_class": "actual home plate (dirt cutout apex)" }, "proposal_shift_m": 8.0, "basis": "Back point of the light home-plate dirt cutout where the foul lines meet (grid read). The earlier 'south vertex' pick overshot the vertex by ~8 m onto the warning track.", "estimated_uncertainty_m": 10, "after_crop": "after/hou-minute-maid-park_corrected.png", "before_crop": "before/hou-minute-maid-park_before.png" }, "current_franchise": "HOU" }, { "venue_id": "ath-oak-coliseum", "name": "Oakland Coliseum", "city": "Oakland", "state_or_province": "California", "country": "United States", "aliases": [ "The Coliseum", "Oakland-Alameda County Coliseum", "RingCentral Coliseum", "Network Associates Coliseum", "O.co Coliseum" ], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": "https://en.wikipedia.org/wiki/Oakland_Coliseum", "coordinate_confidence": "unresolved", "site_note": "Distinct physical baseball venue from adjacent Oakland Arena; sponsor names do not create new venue identities.", "sources": [ "https://en.wikipedia.org/wiki/Oakland_Coliseum", "https://www.mlb.com/athletics/history/ballpark" ], "uncertainties": [ "A demolition year was not established in fetched sources." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": 37.75167, "longitude": -122.20056, "source": "https://en.wikipedia.org/wiki/Oakland_Coliseum" }, "site_id": "ath-oak-coliseum", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 2024, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": "https://en.wikipedia.org/wiki/Oakland_Coliseum" }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Oakland_Coliseum" } }, { "venue_id": "ang-wrigley-la", "name": "Wrigley Field (Los Angeles)", "city": "Los Angeles", "state_or_province": "California", "country": "United States", "aliases": [ "Los Angeles Wrigley Field", "Wrigley Field" ], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": "https://en.wikipedia.org/wiki/Wrigley_Field_(Los_Angeles)", "coordinate_confidence": "unresolved", "site_note": "Los Angeles park; not Chicago Wrigley Field.", "sources": [ "https://en.wikipedia.org/wiki/Wrigley_Field_(Los_Angeles)", "https://www.mlb.com/angels/history/ballparks" ], "uncertainties": [ "Demolition year was not established in fetched sources." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": 34.0075, "longitude": -118.26611, "source": "https://en.wikipedia.org/wiki/Wrigley_Field_(Los_Angeles)" }, "site_id": "ang-wrigley-la", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1961, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": "https://en.wikipedia.org/wiki/Wrigley_Field_(Los_Angeles)" }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Wrigley_Field_(Los_Angeles)" } }, { "venue_id": "lad-dodger-stadium", "name": "Dodger Stadium", "city": "Los Angeles", "state_or_province": "California", "country": "United States", "aliases": [ "Chavez Ravine", "Dodger Stadium", "UNIQLO Field at Dodger Stadium" ], "opened_year": 1962, "latitude": 34.07361, "longitude": -118.24, "coordinate_source": "https://en.wikipedia.org/wiki/Dodger_Stadium", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "Same physical Dodger Stadium as the Dodgers venue; shared Angels home 1962-65.", "sources": [ "https://en.wikipedia.org/wiki/Dodger_Stadium", "https://www.mlb.com/angels/history/ballparks", "https://www.mlb.com/dodgers/history/ballparks", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest" ], "uncertainties": [], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "lad-dodger-stadium", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 2 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified", "coarse_published_component_3_or_fewer_decimals" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 34.07361, "longitude": -118.24, "source": "https://en.wikipedia.org/wiki/Dodger_Stadium" }, "map_point": { "latitude": 34.073422, "longitude": -118.240244, "target_type": "dirt-circle centre", "status": "Proposed imagery point · not approved for scoring", "sources": [ "https://en.wikipedia.org/wiki/Dodger_Stadium", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer", "https://www.bing.com/maps (aerial tile service)" ], "uncertainty_m": 8, "uncertainty_status": "Analyst estimate, not measured accuracy", "basis": "Dirt-circle centre on the Bing capture; foul lines converge at the same point (grid read: circle edges x 518-580, y 693-757). The earlier pick sat ~11 m SW, beside the painted LA logo in foul ground." }, "coordinate_audit": { "franchise": "LAD", "venue_id": "lad-dodger-stadium", "park_name": "Dodger Stadium", "city": "Los Angeles", "original_latitude": 34.07361, "original_longitude": -118.24, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": 34.073348, "proposed_longitude": -118.240332, "proposed_target_type": "home plate", "displacement_m": 42.2, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed; Bing Maps aerial tiles (zoom 19) as second source", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Bing aerial: home dirt circle center at foul-line convergence, logo behind plate visible; Esri image has tree/stand shadow over plate area and read ~10 m NE", "estimated_uncertainty_m": 8, "confidence": "high", "source_urls": [ "https://en.wikipedia.org/wiki/Dodger_Stadium", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer", "https://www.bing.com/maps (aerial tile service)" ], "review_status": "proposed - imagery-read home plate, not surveyed, not approved for scoring", "notes": "Original longitude had only 2 decimal places (-118.24). Bing aerial is the decisive source; in Esri imagery the plate area is in shadow." }, "coordinate_correction": { "venue_id": "lad-dodger-stadium", "park_name": "Dodger Stadium", "status": "corrected proposal - PROPOSED, not approved for scoring", "previous_proposal": { "latitude": 34.073348, "longitude": -118.240332, "displacement_from_published_m": 42.2, "canvas_pixel": [ 517, 758 ], "source": "first package audit / supplement plate_evidence.json (preserved unchanged)" }, "corrected_proposal": { "latitude": 34.073422, "longitude": -118.240244, "displacement_from_published_m": 30.7, "canvas_pixel": [ 550, 725 ], "canvas": "imagery_bing", "canvas_top_left_global_px": [ 23025156, 53581995 ], "point_class": "dirt-circle centre" }, "proposal_shift_m": 11.5, "basis": "Dirt-circle centre on the Bing capture; foul lines converge at the same point (grid read: circle edges x 518-580, y 693-757). The earlier pick sat ~11 m SW, beside the painted LA logo in foul ground.", "estimated_uncertainty_m": 8, "after_crop": "after/lad-dodger-stadium_corrected.png", "before_crop": "before/lad-dodger-stadium_before.png" }, "current_franchise": "LAD" }, { "venue_id": "ang-angel", "name": "Angel Stadium", "city": "Anaheim", "state_or_province": "California", "country": "United States", "aliases": [ "Anaheim Stadium", "Edison International Field" ], "opened_year": 1966, "latitude": 33.80028, "longitude": -117.88278, "coordinate_source": "https://en.wikipedia.org/wiki/Angel_Stadium", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "One physical park; sponsor/former names are aliases.", "sources": [ "https://en.wikipedia.org/wiki/Angel_Stadium", "https://www.mlb.com/angels/history/ballparks", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest" ], "uncertainties": [], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "ang-angel", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 33.80028, "longitude": -117.88278, "source": "https://en.wikipedia.org/wiki/Angel_Stadium" }, "map_point": { "latitude": 33.799925, "longitude": -117.883188, "target_type": "dirt-circle centre", "status": "Proposed imagery point · not approved for scoring", "sources": [ "https://en.wikipedia.org/wiki/Angel_Stadium", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "uncertainty_m": 10, "uncertainty_status": "Analyst estimate, not measured accuracy", "basis": "Centre of the home dirt circle at the vertex where both basepath strips meet, on a clean Bing capture (grid read: circle x 465-512, y 778-822). The Esri capture used originally was taken during a non-baseball event that covered the infield; the earlier pick sat ~32 m away in the event dirt / infield skin and was not the plate." }, "coordinate_audit": { "franchise": "LAA", "venue_id": "ang-angel", "park_name": "Angel Stadium", "city": "Anaheim", "original_latitude": 33.80028, "original_longitude": -117.88278, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": 33.800193, "proposed_longitude": -117.88307, "proposed_target_type": "home plate", "displacement_m": 28.5, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Esri imagery: home dirt circle identified", "estimated_uncertainty_m": 10, "confidence": "medium-high", "source_urls": [ "https://en.wikipedia.org/wiki/Angel_Stadium", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "review_status": "proposed - imagery-read home plate, not surveyed, not approved for scoring", "notes": "" }, "coordinate_correction": { "venue_id": "ang-angel", "park_name": "Angel Stadium", "status": "corrected proposal - PROPOSED, not approved for scoring", "previous_proposal": { "latitude": 33.800193, "longitude": -117.88307, "displacement_from_published_m": 28.5, "canvas_pixel": [ 532, 680 ], "source": "first package audit / supplement plate_evidence.json (preserved unchanged)" }, "corrected_proposal": { "latitude": 33.799925, "longitude": -117.883188, "displacement_from_published_m": 54.6, "canvas_pixel": [ 488, 800 ], "canvas": "imagery_bing", "canvas_top_left_global_px": [ 23158338, 53704823 ], "point_class": "dirt-circle centre - second capture" }, "proposal_shift_m": 31.7, "basis": "Centre of the home dirt circle at the vertex where both basepath strips meet, on a clean Bing capture (grid read: circle x 465-512, y 778-822). The Esri capture used originally was taken during a non-baseball event that covered the infield; the earlier pick sat ~32 m away in the event dirt / infield skin and was not the plate.", "estimated_uncertainty_m": 10, "after_crop": "after/ang-angel_corrected.png", "before_crop": "before/ang-angel_before.png" }, "current_franchise": "LAA" }, { "venue_id": "brooklyn-washington-park-i", "name": "Washington Park (original)", "city": "Brooklyn", "state_or_province": "New York", "country": "United States", "aliases": [ "Old Washington Park", "Washington Base-Ball Park", "Washington Park" ], "opened_year": 1883, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "site_note": "Original Washington Park; MLB page says it burned in 1889 and was rebuilt, while the later 1898 New Washington Park is separate.", "sources": [ "https://en.wikipedia.org/wiki/Washington_Park_(baseball)", "https://theoldstonehouse.org/history/brooklyn-dodgers/", "https://www.mlb.com/dodgers/history/ballparks", "https://www.nycgovparks.org/parks/washington-park/highlights/138" ], "uncertainties": [ "The page does not establish a separate MLB-season split for the 1889 rebuild; coordinates/demolition year not established." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "carried from sourced pilot; not re-fetched in this pass", "site_id": "brooklyn-washington-park-i", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1890, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "brooklyn-ridgewood-park", "name": "Ridgewood Park", "city": "Queens", "state_or_province": "New York", "country": "United States", "aliases": [ "Horse Market", "Meyerrose’s Park", "Wallace’s Grounds" ], "opened_year": 1886, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "site_note": "Official Dodgers history identifies Sunday home games here for four seasons.", "sources": [ "https://www.mlb.com/dodgers/history/ballparks" ], "uncertainties": [ "Coordinates and demolition year not established in fetched sources.", "Exact closing/demolition/current use not established." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "carried from sourced pilot; not re-fetched in this pass", "site_id": "brooklyn-ridgewood-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1889, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "brooklyn-eastern-park", "name": "Eastern Park", "city": "Brooklyn", "state_or_province": "New York", "country": "United States", "aliases": [ "East New York Park", "Eastern Park", "Eastern Park Grounds" ], "opened_year": 1890, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "site_note": "Distinct Brooklyn field from both Washington Parks.", "sources": [ "https://en.wikipedia.org/wiki/Eastern_Park", "https://theoldstonehouse.org/history/brooklyn-dodgers/", "https://www.mlb.com/dodgers/history/ballparks" ], "uncertainties": [], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "carried from sourced pilot; not re-fetched in this pass", "site_id": "brooklyn-eastern-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1897, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "brooklyn-washington-park-ii", "name": "New Washington Park", "city": "Brooklyn", "state_or_province": "New York", "country": "United States", "aliases": [ "New Washington Park", "Washington Park II" ], "opened_year": 1898, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "site_note": "Distinct 1898 replacement park, separate from original Washington Park.", "sources": [ "https://en.wikipedia.org/wiki/Washington_Park_(baseball)", "https://sabr.org/journal/article/a-park-grows-in-brooklyn/", "https://theoldstonehouse.org/history/brooklyn-dodgers/", "https://www.mlb.com/dodgers/history/ballparks" ], "uncertainties": [ "Published coordinates and demolition year not established in fetched sources." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "carried from sourced pilot; not re-fetched in this pass", "site_id": "brooklyn-washington-park-ii", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1912, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "brooklyn-ebbets-field", "name": "Ebbets Field", "city": "Brooklyn", "state_or_province": "New York", "country": "United States", "aliases": [ "Brooklyn Dodgers ballpark", "Ebbets Field" ], "opened_year": 1913, "latitude": 40.665, "longitude": -73.95806, "coordinate_source": "https://en.wikipedia.org/wiki/Ebbets_Field", "coordinate_confidence": "published", "site_note": "Brooklyn Dodgers home through 1957.", "sources": [ "https://ballparkmuseum.com/ebbets-field/", "https://en.wikipedia.org/wiki/Ebbets_Field", "https://sabr.org/bioproj/park/ebbets-field-brooklyn-ny/", "https://sabr.org/bioproj/topic/twilight-at-ebbets-field/", "https://sabr.org/gamesproj/game/april-9-1913-brooklyn-falls-in-first-regular-season-game-at-ebbets-field/", "https://www.hmdb.org/m.asp?m=242772", "https://www.mlb.com/dodgers/history/ballparks", "https://www.nycgovparks.org/parks/jackie-robinson-playground/history", "https://www.untappedcities.com/marker-for-ebbets-field-home-plate-is-in-a-brooklyn-apartment-parking-lot/" ], "uncertainties": [], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "carried from sourced pilot; not re-fetched in this pass", "site_id": "brooklyn-ebbets-field", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1957, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 3, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified", "coarse_published_component_3_or_fewer_decimals" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 40.665, "longitude": -73.95806, "source": "https://en.wikipedia.org/wiki/Ebbets_Field" }, "map_point": { "latitude": 40.665, "longitude": -73.95806, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Ebbets_Field" }, "historical_pilot": { "venue_id": "brooklyn-ebbets-field", "name": "Ebbets Field", "site_id": "brooklyn-ebbets-field", "borough": "Brooklyn", "location_description": "Block bounded by Bedford Ave (east), Sullivan Place (south), McKeever Place (west; originally Cedar St, renamed 1932) and Montgomery St (north), Flatbush/Crown Heights, Brooklyn. Address 55 Sullivan Place, Brooklyn, NY 11225; rotunda entrance at Sullivan Place/McKeever Place.", "site_point": { "latitude": 40.665, "longitude": -73.95806, "target_type": "published_site_point", "source": "https://en.wikipedia.org/wiki/Ebbets_Field" }, "home_plate": { "status": "marker_documented_coordinates_unresolved", "latitude": null, "longitude": null, "note": "A home-plate-shaped plaque set in a sidewalk in a parking lot inside the apartment complex, just off Sullivan Place, is presented by its installers as the original plate location. No sourced lat/lon for the plaque itself. Do NOT present the published stadium point (40.665, -73.95806) as the plate. Plaque-text caution: one secondary transcription gives Robinson's date on the plaque as 'April 5, 1947'; the NYT transcription gives April 15, 1947 (his debut). Treat 'April 5, 1947' as a transcription error until the plaque is photographed directly." }, "opened": { "date": "1913-04-09", "note": "First regular-season game (Philadelphia 1-0 Brooklyn). First exhibition 1913-04-05 vs Yankees. Groundbreaking 1912-03-04; cornerstone 1912-07-06." }, "names": [ { "name": "Ebbets Field", "period": "1913-1957", "note": "For owner Charles Ebbets. No former name, no sponsor rename. Superbas/Robins/Dodgers are team nicknames, not venue names." } ], "tenancies": [ { "franchise": "LAD", "team": "Brooklyn Dodgers (NL)", "first_season": 1913, "last_season": 1957, "note": "Dodgers also played 7 home games in 1956 and 8 in 1957 at Roosevelt Stadium, Jersey City - selected displaced home games, not a change of home park. Non-MLB context: Brooklyn Eagles (Negro National League) 1935." } ], "final_mlb_use": { "last_regular_season_game": "1957-09-24 (Dodgers 2-0 Pittsburgh)", "last_postseason": "1956 World Series (concluded at Ebbets in Game 7, 1956-10-10)", "note": "Distinguish the 1957 regular-season finale from the earlier last postseason." }, "demolition": { "began": "1960-02-23", "note": "Ceremonial start with Campanella, Erskine, Branca present. Property sold 1956-10-30 to Marvin Kratter with a 1957 leaseback; miscellaneous events 1958-59. 'Closed: January 1958' in some infoboxes is end of tenancy, NOT demolition. A marker-database claim of 'demolished in 1961' conflicts with the 1960 start and should not be used." }, "site_today": "Ebbets Field Apartments, later renamed Jackie Robinson Apartments (Mitchell-Lama complex, built 1962) occupying the whole block; Jackie Robinson School (P.S. 375) and Jackie Robinson Playground across McKeever Place.", "markers_and_survivals": [ { "type": "in_situ_commemorative_plaque", "description": "Home-plate-shaped plaque in a parking-lot sidewalk off Sullivan Place, marking the claimed original plate location (see home_plate note).", "is_original_plate": false }, { "type": "commemorative_plaque_general", "description": "Cornerstone plaque (dated 1962) at the apartment entrance, Bedford Ave/Sullivan Place area: 'This is the former site of Ebbets Field.' The original 1912 cornerstone is held by the Baseball Hall of Fame - relocated, not on site.", "is_original_plate": false }, { "type": "relocated_survival", "description": "The original centre-field flagpole was re-installed outside Barclays Center in 2012 - a genuine Ebbets survival at a DIFFERENT site; do not geocode it as an Ebbets Field point.", "is_original_plate": false } ], "exploratory_map": "yes - site point, plaque noted", "recommended_for_scoring": false, "sources": [ "https://sabr.org/bioproj/topic/twilight-at-ebbets-field/", "https://sabr.org/gamesproj/game/april-9-1913-brooklyn-falls-in-first-regular-season-game-at-ebbets-field/", "https://en.wikipedia.org/wiki/Ebbets_Field", "https://ballparkmuseum.com/ebbets-field/", "https://www.untappedcities.com/marker-for-ebbets-field-home-plate-is-in-a-brooklyn-apartment-parking-lot/", "https://www.hmdb.org/m.asp?m=242772" ] } }, { "venue_id": "jersey-city-roosevelt-stadium", "name": "Roosevelt Stadium", "city": "Jersey City", "state_or_province": "New Jersey", "country": "United States", "aliases": [ "Jersey City Municipal Stadium", "Roosevelt Stadium", "Roosevelt Stadium (Jersey City)" ], "opened_year": 1937, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "site_note": "Seven Dodgers home games in 1956 and seven in 1957; included because official Dodgers ballpark history lists it.", "sources": [ "https://www.mlb.com/dodgers/history/ballparks" ], "uncertainties": [ "Published coordinates not established in fetched sources; MLB tenancy was partial seasons." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "carried from sourced pilot; not re-fetched in this pass", "site_id": "jersey-city-roosevelt-stadium", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1957, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "lad-coliseum", "name": "Los Angeles Memorial Coliseum", "city": "Los Angeles", "state_or_province": "California", "country": "United States", "aliases": [ "Los Angeles Coliseum", "LA Memorial Coliseum" ], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": "https://en.wikipedia.org/wiki/Los_Angeles_Memorial_Coliseum", "coordinate_confidence": "unresolved", "site_note": "Dodgers temporary Los Angeles home, 1958-61; physically distinct from Dodger Stadium.", "sources": [ "https://en.wikipedia.org/wiki/Los_Angeles_Memorial_Coliseum", "https://www.mlb.com/dodgers/history/ballparks" ], "uncertainties": [], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": 34.01417, "longitude": -118.28778, "source": "https://en.wikipedia.org/wiki/Los_Angeles_Memorial_Coliseum" }, "site_id": "lad-coliseum", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1961, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": "https://en.wikipedia.org/wiki/Los_Angeles_Memorial_Coliseum" }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Los_Angeles_Memorial_Coliseum" } }, { "venue_id": "ny-polo-grounds-i", "name": "Polo Grounds I", "city": "New York", "state_or_province": "New York", "country": "United States", "aliases": [ "Original Polo Grounds", "Polo Grounds (Central Park site)", "Polo Grounds I", "original Polo Grounds" ], "opened_year": 1879, "latitude": 40.79806, "longitude": -73.95056, "coordinate_source": "https://en.wikipedia.org/wiki/Polo_Grounds", "coordinate_confidence": "published", "site_note": "Distinct original field north of Central Park; Giants home from 1883-88.", "sources": [ "https://en.wikipedia.org/wiki/List_of_baseball_parks_in_New_York_City", "https://en.wikipedia.org/wiki/Polo_Grounds", "https://sabr.org/bioproj/park/polo-grounds-new-york/", "https://sabr.org/journal/article/the-first-and-last-games-at-the-polo-groundses/", "https://www.mlb.com/giants/history/ballpark", "https://www.sabr.org/bioproj/park/polo-grounds-new-york/" ], "uncertainties": [], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "carried from sourced pilot; not re-fetched in this pass", "site_id": "ny-polo-grounds-i", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1888, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 40.79806, "longitude": -73.95056, "source": "https://en.wikipedia.org/wiki/Polo_Grounds" }, "map_point": { "latitude": 40.79806, "longitude": -73.95056, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Polo_Grounds" }, "historical_pilot": { "venue_id": "ny-polo-grounds-i", "name": "Polo Grounds I", "site_id": "ny-polo-grounds-i", "borough": "Manhattan", "location_description": "Block bounded by W. 110th St (south), W. 112th St (north), Fifth Ave (east) and Sixth Ave/Lenox Ave (west), directly across 110th St from the NE corner of Central Park.", "site_point": { "latitude": 40.79806, "longitude": -73.95056, "target_type": "published_site_point", "source": "https://en.wikipedia.org/wiki/Polo_Grounds" }, "home_plate": { "status": "unresolved", "latitude": null, "longitude": null, "note": "ILL-POSED as a single point: the grounds held TWO diamonds in 1883 - southeast (National League) and southwest (American Association) - later consolidated to the eastern/southeast diamond. A plate point would have to specify diamond and season. No sourced plate point found." }, "opened": { "date": null, "note": "Built for polo (1876 in some revisions, 1879 in others - sources disagree because these are different events). First professional baseball Sep 1880 (Metropolitans lease; SABR Games Project: opened for baseball 1880-09-29). First major-league games 1883 (NL on the southeast diamond, 1883-05-01)." }, "names": [ { "name": "(the) polo grounds - descriptive phrase that became a proper name by use", "period": "1876/79-1889", "note": "No formal naming act and no dated rename." } ], "tenancies": [ { "franchise": "NYMTR", "team": "New York Metropolitans (AA)", "first_season": 1883, "last_season": 1885, "note": "Independent 1880-82 before AA. A distinct club from the later NL Mets - do not merge identities." }, { "franchise": "SFG", "team": "New York Gothams/Giants (NL)", "first_season": 1883, "last_season": 1888, "note": "'Giants' nickname adopted during this tenure (conventionally 1885; dating is conventional, not contemporary-verified)." } ], "final_mlb_use": { "last_game_overall": "1888-10-20 (Game 5 of the 1888 World's Championship Series, Giants vs St. Louis Browns, called for darkness after the 8th)", "last_regular_home_game": "1888-10-13 (secondary source)", "note": "The two dates are different events; keep separate. SABR: until 1996 this was the only stadium to end its history with a World Series game." }, "demolition": { "year": 1889, "note": "Club evicted by the city's extension of W. 111th St through the site; grounds removed 1889. No phased dates sourced." }, "site_today": "Commercial and residential buildings and Harlem Academy on the 110th-112th/Fifth-Sixth block. No ballpark fabric survives.", "markers_and_survivals": [], "marker_note": "No original home-plate marker, memorial, or surviving structure is documented in any source consulted. Recorded as 'none documented' - do not invent one.", "exploratory_map": "yes - site point only, with two-diamond note", "recommended_for_scoring": false, "sources": [ "https://sabr.org/journal/article/the-first-and-last-games-at-the-polo-groundses/", "https://en.wikipedia.org/wiki/Polo_Grounds", "https://en.wikipedia.org/wiki/List_of_baseball_parks_in_New_York_City" ] } }, { "venue_id": "ny-polo-grounds-ii", "name": "Polo Grounds II / Manhattan Field", "city": "New York", "state_or_province": "New York", "country": "United States", "aliases": [ "Manhattan Field", "New Polo Grounds", "Polo Grounds (1889–1890)", "Polo Grounds II" ], "opened_year": 1889, "latitude": 40.83028, "longitude": -73.93778, "coordinate_source": "https://en.wikipedia.org/wiki/Polo_Grounds", "coordinate_confidence": "published", "site_note": "Distinct Coogan’s Hollow field from Polo Grounds I and Polo Grounds III/IV.", "sources": [ "https://en.wikipedia.org/wiki/List_of_baseball_parks_in_New_York_City", "https://en.wikipedia.org/wiki/Polo_Grounds", "https://sabr.org/bioproj/park/manhattan-field-new-york/", "https://sabr.org/bioproj/park/polo-grounds-new-york/", "https://sabr.org/journal/article/the-first-and-last-games-at-the-polo-groundses/", "https://www.mlb.com/giants/history/ballpark", "https://www.sabr.org/bioproj/park/polo-grounds-new-york/" ], "uncertainties": [], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "carried from sourced pilot; not re-fetched in this pass", "site_id": "ny-polo-grounds-ii", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1890, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 40.83028, "longitude": -73.93778, "source": "https://en.wikipedia.org/wiki/Polo_Grounds" }, "map_point": { "latitude": 40.83028, "longitude": -73.93778, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Polo_Grounds" }, "historical_pilot": { "venue_id": "ny-polo-grounds-ii", "name": "Polo Grounds II / Manhattan Field", "site_id": "ny-polo-grounds-ii", "borough": "Manhattan", "location_description": "Southern half of Coogan's Hollow, beneath the 155th St viaduct at W. 155th St & Eighth Ave (Frederick Douglass Blvd) - immediately south of, and adjacent to, the final Polo Grounds site (northern half). Its home-to-centre orientation ran NORTH (the final grounds ran east).", "site_point": { "latitude": 40.83028, "longitude": -73.93778, "target_type": "published_site_point", "source": "https://en.wikipedia.org/wiki/Polo_Grounds", "note": "Only ~150 m south of the final-site point, consistent with the south-vs-north hollow description - a sanity check, not a verification." }, "home_plate": { "status": "unresolved", "latitude": null, "longitude": null, "note": "No sourced plate point and no marker (SABR BioProject is explicit that no on-site reminder was planted)." }, "opened": { "date": "1889-07-08", "note": "Christened the 'New Polo Grounds'. Giants 7-5 Pittsburgh in the first game, after an itinerant start to 1889 (Oakdale Park, Jersey City; St. George, Staten Island). Seats reportedly moved from Polo Grounds I." }, "names": [ { "name": "New Polo Grounds / Polo Grounds II", "period": "1889-1890" }, { "name": "Manhattan Field", "period": "1891 onwards", "note": "After the NL Giants moved north into Brotherhood Park and took the 'Polo Grounds' name with them; the II site was sub-leased to the Manhattan Athletic Club and converted to football/track/other sports." } ], "tenancies": [ { "franchise": "SFG", "team": "New York Giants (NL)", "first_season": 1889, "last_season": 1890, "note": "From 1889-07-08." }, { "franchise": "LAD", "team": "Brooklyn (NL)", "first_season": 1890, "last_season": 1890, "role": "selected home games only", "note": "Two home series as a displaced home club in late July/early Aug 1890 - NOT a full-season tenancy." } ], "final_mlb_use": { "last_game": "1890-09-13 (Giants vs Brooklyn, rain-shortened)", "note": "Score listed 8-4 (NYT box score) vs 8-3 (Retrosheet) depending on the uncompleted 7th-inning run - flag the disagreement; the date is not in dispute." }, "demolition": { "status": "phased - do not give a single date", "phases": [ "Grandstand superstructure dismantled gradually, substantially in 1911 after the Polo Grounds III fire (material cannibalised for III spares, per SABR BioProject).", "Playing field/lot survived as an amateur sports ground into the 20th century (reported in local papers as late as spring 1942).", "June 1948: Giants leased the property again and paved it as a parking lot for the final Polo Grounds.", "A local-history claim of 'used until 1903, razed' conflicts with SABR/Wikipedia on the field's survival - flagged unresolved; prefer SABR BioProject." ] }, "site_today": "Within/under the Polo Grounds Towers public-housing tract (the city acquired the combined Polo Grounds/Manhattan Field tract by eminent domain in the 1960s); apartment buildings and former parking/open areas.", "markers_and_survivals": [], "marker_note": "None - per SABR BioProject, 'New York's forgotten ballpark'.", "exploratory_map": "yes - site point only", "recommended_for_scoring": false, "modelling_note": "Separate site_id from Polo Grounds I and from the final site. South parcel of Coogan's Hollow != north parcel, despite the shared locality and name history.", "sources": [ "https://sabr.org/journal/article/the-first-and-last-games-at-the-polo-groundses/", "https://sabr.org/bioproj/park/manhattan-field-new-york/", "https://en.wikipedia.org/wiki/Polo_Grounds", "https://en.wikipedia.org/wiki/List_of_baseball_parks_in_New_York_City" ] } }, { "venue_id": "sf-seals-stadium", "name": "Seals Stadium", "city": "San Francisco", "state_or_province": "California", "country": "United States", "aliases": [ "Seals Stadium" ], "opened_year": 1931, "latitude": null, "longitude": null, "coordinate_source": "https://en.wikipedia.org/wiki/Seals_Stadium", "coordinate_confidence": "unresolved", "site_note": "Temporary San Francisco Giants home, 1958-59.", "sources": [ "https://en.wikipedia.org/wiki/Seals_Stadium", "https://sabr.org/bioproj/park/oracle-park-san-francisco/", "https://www.mlb.com/giants/history/ballpark" ], "uncertainties": [], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "carried from sourced pilot; not re-fetched in this pass", "site_id": "sf-seals-stadium", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1959, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": "https://en.wikipedia.org/wiki/Seals_Stadium" }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Seals_Stadium" } }, { "venue_id": "sf-candlestick-park", "name": "Candlestick Park", "city": "San Francisco", "state_or_province": "California", "country": "United States", "aliases": [ "3Com Park", "Candlestick Park", "Candlestick Point stadium", "SBC Park at Candlestick Point", "The Stick" ], "opened_year": 1960, "latitude": 37.71361, "longitude": -122.38611, "coordinate_source": "https://en.wikipedia.org/wiki/Candlestick_Park", "coordinate_confidence": "published", "site_note": "Giants MLB home through 1999; sponsor aliases do not create new physical venues.", "sources": [ "https://en.wikipedia.org/wiki/Candlestick_Park", "https://sabr.org/bioproj/park/oracle-park-san-francisco/", "https://www.49ers.com/photos/candlestick-park-demolition-14887695", "https://www.mlb.com/giants/history/ballpark" ], "uncertainties": [], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "carried from sourced pilot; not re-fetched in this pass", "site_id": "sf-candlestick-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1999, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 37.71361, "longitude": -122.38611, "source": "https://en.wikipedia.org/wiki/Candlestick_Park" }, "map_point": { "latitude": 37.71361, "longitude": -122.38611, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Candlestick_Park" } }, { "venue_id": "sf-oracle-park", "name": "Oracle Park", "city": "San Francisco", "state_or_province": "California", "country": "United States", "aliases": [ "AT&T Park", "AT&T Park (2006–2018)", "Pacific Bell Park", "Pacific Bell Park (2000–2003)", "SBC Park", "SBC Park (2004–2005)" ], "opened_year": 2000, "latitude": 37.77861, "longitude": -122.38917, "coordinate_source": "https://en.wikipedia.org/wiki/Oracle_Park", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "One physical venue across sponsor-name changes.", "sources": [ "https://en.wikipedia.org/wiki/Oracle_Park", "https://sabr.org/bioproj/park/oracle-park-san-francisco/", "https://www.latlong.net/place/oracle-park-ca-usa-31970.html", "https://www.mlb.com/giants/ballpark", "https://www.mlb.com/giants/history/ballpark", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest", "https://www.sfmta.com/places/oracle-park" ], "uncertainties": [], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "sf-oracle-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 37.77861, "longitude": -122.38917, "source": "https://en.wikipedia.org/wiki/Oracle_Park" }, "map_point": { "latitude": 37.77836, "longitude": -122.389922, "target_type": "actual home plate (dirt-circle centre)", "status": "Proposed imagery point · not approved for scoring", "sources": [ "https://en.wikipedia.org/wiki/Oracle_Park", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "uncertainty_m": 10, "uncertainty_status": "Analyst estimate, not measured accuracy", "basis": "Esri imagery: home dirt circle identified" }, "coordinate_audit": { "franchise": "SFG", "venue_id": "sf-oracle-park", "park_name": "Oracle Park", "city": "San Francisco", "original_latitude": 37.77861, "original_longitude": -122.38917, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": 37.77836, "proposed_longitude": -122.389922, "proposed_target_type": "home plate", "displacement_m": 71.7, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Esri imagery: home dirt circle identified", "estimated_uncertainty_m": 10, "confidence": "medium-high", "source_urls": [ "https://en.wikipedia.org/wiki/Oracle_Park", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "review_status": "proposed - imagery-read home plate, not surveyed, not approved for scoring", "notes": "" }, "current_franchise": "SFG" }, { "venue_id": "sd-stadium", "name": "San Diego Stadium", "city": "San Diego", "state_or_province": "California", "country": "United States", "aliases": [ "Jack Murphy Stadium", "Qualcomm Stadium", "Petco Park predecessor" ], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": "https://en.wikipedia.org/wiki/San_Diego_Stadium", "coordinate_confidence": "unresolved", "site_note": "Padres MLB home from 1969-2003; venue opened before the expansion club and changed names.", "sources": [ "https://en.wikipedia.org/wiki/Petco_Park", "https://en.wikipedia.org/wiki/San_Diego_Stadium" ], "uncertainties": [], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": 32.78306, "longitude": -117.11944, "source": "https://en.wikipedia.org/wiki/San_Diego_Stadium" }, "site_id": "sd-stadium", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 2003, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": "https://en.wikipedia.org/wiki/San_Diego_Stadium" }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/San_Diego_Stadium" } }, { "venue_id": "sd-petco", "name": "Petco Park", "city": "San Diego", "state_or_province": "California", "country": "United States", "aliases": [ "Petco Park" ], "opened_year": 2004, "latitude": 32.7073, "longitude": -117.1566, "coordinate_source": "https://en.wikipedia.org/wiki/Petco_Park", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "Opened for the Padres in 2004; no spring-training-only sites included.", "sources": [ "https://en.wikipedia.org/wiki/Petco_Park", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest" ], "uncertainties": [], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "sd-petco", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 4, "longitude": 4 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 32.7073, "longitude": -117.1566, "source": "https://en.wikipedia.org/wiki/Petco_Park" }, "map_point": { "latitude": 32.707056, "longitude": -117.157077, "target_type": "actual home plate (dirt-circle centre)", "status": "Proposed imagery point · not approved for scoring", "sources": [ "https://en.wikipedia.org/wiki/Petco_Park", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "uncertainty_m": 10, "uncertainty_status": "Analyst estimate, not measured accuracy", "basis": "Esri imagery: home dirt circle identified" }, "coordinate_audit": { "franchise": "SDP", "venue_id": "sd-petco", "park_name": "Petco Park", "city": "San Diego", "original_latitude": 32.7073, "original_longitude": -117.1566, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": 32.707056, "proposed_longitude": -117.157077, "proposed_target_type": "home plate", "displacement_m": 52.2, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Esri imagery: home dirt circle identified", "estimated_uncertainty_m": 10, "confidence": "medium-high", "source_urls": [ "https://en.wikipedia.org/wiki/Petco_Park", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "review_status": "proposed - imagery-read home plate, not surveyed, not approved for scoring", "notes": "" }, "current_franchise": "SDP" }, { "venue_id": "sea-kingdome", "name": "Kingdome", "city": "Seattle", "state_or_province": "Washington", "country": "United States", "aliases": [ "King County Domed Stadium", "Kingdome" ], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": "https://en.wikipedia.org/wiki/Kingdome", "coordinate_confidence": "unresolved", "site_note": "Mariners home 1977 through June 1999.", "sources": [ "https://en.wikipedia.org/wiki/Kingdome", "https://www.mlb.com/mariners/history/ballparks" ], "uncertainties": [], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": 47.59528, "longitude": -122.33139, "source": "https://en.wikipedia.org/wiki/Kingdome" }, "site_id": "sea-kingdome", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1999, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": "https://en.wikipedia.org/wiki/Kingdome" }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Kingdome" } }, { "venue_id": "sea-tmobile", "name": "T-Mobile Park", "city": "Seattle", "state_or_province": "Washington", "country": "United States", "aliases": [ "Safeco Field", "T-Mobile Park" ], "opened_year": 1999, "latitude": 47.591, "longitude": -122.333, "coordinate_source": "https://en.wikipedia.org/wiki/T-Mobile_Park", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "One physical park; Safeco/T-Mobile are naming aliases.", "sources": [ "https://en.wikipedia.org/wiki/T-Mobile_Park", "https://www.mlb.com/mariners/history/ballparks", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest" ], "uncertainties": [], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "sea-tmobile", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 3, "longitude": 3 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified", "coarse_published_component_3_or_fewer_decimals" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 47.591, "longitude": -122.333, "source": "https://en.wikipedia.org/wiki/T-Mobile_Park" }, "map_point": { "latitude": 47.591138, "longitude": -122.332917, "target_type": "inferred foul-line convergence", "status": "Proposed imagery point · not approved for scoring", "sources": [ "https://en.wikipedia.org/wiki/T-Mobile_Park", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "uncertainty_m": 8, "uncertainty_status": "Analyst estimate, not measured accuracy", "basis": "Esri imagery (retractable roof open): home area identified; Bing aerial shows roof closed and was not used for the point" }, "coordinate_audit": { "franchise": "SEA", "venue_id": "sea-tmobile", "park_name": "T-Mobile Park", "city": "Seattle", "original_latitude": 47.591, "original_longitude": -122.333, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": 47.591138, "proposed_longitude": -122.332917, "proposed_target_type": "home plate", "displacement_m": 16.6, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Esri imagery (retractable roof open): home area identified; Bing aerial shows roof closed and was not used for the point", "estimated_uncertainty_m": 8, "confidence": "high", "source_urls": [ "https://en.wikipedia.org/wiki/T-Mobile_Park", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "review_status": "proposed - imagery-read home plate, not surveyed, not approved for scoring", "notes": "Original point had only 3 decimal places. Esri imagery has the retractable roof open; Bing aerial (roof closed) was not used for this point." }, "current_franchise": "SEA" }, { "venue_id": "ari-chase", "name": "Chase Field", "city": "Phoenix", "state_or_province": "Arizona", "country": "United States", "aliases": [ "Bank One Ballpark", "Chase Field" ], "opened_year": 1998, "latitude": 33.44528, "longitude": -112.06694, "coordinate_source": "https://en.wikipedia.org/wiki/Chase_Field", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "Arizona’s sole MLB home venue; Bank One was the original sponsor name.", "sources": [ "https://en.wikipedia.org/wiki/Chase_Field", "https://www.mlb.com/dbacks/ballpark", "https://www.mlb.com/dbacks/history/timeline", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest" ], "uncertainties": [ "The fetched page established the park and opening date but did not expose a coordinate pair in the captured text; coordinate pair retained from the page metadata/search result only." ], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "ari-chase", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 33.44528, "longitude": -112.06694, "source": "https://en.wikipedia.org/wiki/Chase_Field" }, "map_point": { "latitude": 33.44528, "longitude": -112.06694, "target_type": "Published site point", "status": "Venue point only · home plate unresolved", "source": "https://en.wikipedia.org/wiki/Chase_Field" }, "coordinate_audit": { "franchise": "ARI", "venue_id": "ari-chase", "park_name": "Chase Field", "city": "Phoenix", "original_latitude": 33.44528, "original_longitude": -112.06694, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": null, "proposed_longitude": null, "proposed_target_type": "none - unresolved", "displacement_m": null, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed; Bing Maps aerial tiles (zoom 19) as second source", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Roof closed in both Esri World Imagery and Bing aerial; home plate not identifiable from aerial imagery.", "estimated_uncertainty_m": null, "confidence": "unresolved", "source_urls": [ "https://en.wikipedia.org/wiki/Chase_Field", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer", "https://www.bing.com/maps (aerial tile service)" ], "review_status": "unresolved - do not use as home plate", "notes": "Retractable roof closed in both available aerial sources. Original published point retained as a venue point only." }, "current_franchise": "ARI" }, { "venue_id": "col-milehigh", "name": "Mile High Stadium", "city": "Denver", "state_or_province": "Colorado", "country": "United States", "aliases": [ "Mile High Stadium" ], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": "https://en.wikipedia.org/wiki/Mile_High_Stadium", "coordinate_confidence": "unresolved", "site_note": "Rockies MLB home 1993-94.", "sources": [ "https://en.wikipedia.org/wiki/Mile_High_Stadium", "https://www.mlb.com/rockies/ballpark/history" ], "uncertainties": [], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": 39.74611, "longitude": -105.02167, "source": "https://en.wikipedia.org/wiki/Mile_High_Stadium" }, "site_id": "col-milehigh", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1994, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": "https://en.wikipedia.org/wiki/Mile_High_Stadium" }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Mile_High_Stadium" } }, { "venue_id": "col-coors", "name": "Coors Field", "city": "Denver", "state_or_province": "Colorado", "country": "United States", "aliases": [ "Coors Field" ], "opened_year": 1995, "latitude": 39.75611, "longitude": -104.99417, "coordinate_source": "https://en.wikipedia.org/wiki/Coors_Field", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "Rockies home since 1995.", "sources": [ "https://en.wikipedia.org/wiki/Coors_Field", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest", "https://www.mlb.com/rockies/ballpark/history" ], "uncertainties": [ "Published coordinate pair was not established in fetched sources." ], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "col-coors", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 39.75611, "longitude": -104.99417, "source": "https://en.wikipedia.org/wiki/Coors_Field" }, "map_point": { "latitude": 39.755721, "longitude": -104.994187, "target_type": "actual home plate (dirt area centre)", "status": "Proposed imagery point · not approved for scoring", "sources": [ "https://en.wikipedia.org/wiki/Coors_Field", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "uncertainty_m": 10, "uncertainty_status": "Analyst estimate, not measured accuracy", "basis": "Esri imagery: home dirt circle identified" }, "coordinate_audit": { "franchise": "COL", "venue_id": "col-coors", "park_name": "Coors Field", "city": "Denver", "original_latitude": 39.75611, "original_longitude": -104.99417, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": 39.755721, "proposed_longitude": -104.994187, "proposed_target_type": "home plate", "displacement_m": 43.3, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Esri imagery: home dirt circle identified", "estimated_uncertainty_m": 10, "confidence": "medium-high", "source_urls": [ "https://en.wikipedia.org/wiki/Coors_Field", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" ], "review_status": "proposed - imagery-read home plate, not surveyed, not approved for scoring", "notes": "" }, "current_franchise": "COL" }, { "venue_id": "mia-sunlife", "name": "Hard Rock Stadium (former Marlins baseball venue)", "city": "Miami Gardens", "state_or_province": "Florida", "country": "United States", "aliases": [ "Joe Robbie Stadium", "Pro Player Stadium", "Dolphins Stadium", "Sun Life Stadium", "Land Shark Stadium" ], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": "https://en.wikipedia.org/wiki/Hard_Rock_Stadium", "coordinate_confidence": "unresolved", "site_note": "One physical stadium under multiple sponsor names; Marlins used it 1993-2011.", "sources": [ "https://en.wikipedia.org/wiki/Hard_Rock_Stadium", "https://www.mlb.com/marlins/history/ballparks" ], "uncertainties": [ "The fetched Marlins page did not expose coordinates or demolition date; venue remains in use but baseball tenancy ended." ], "lifecycle_status": "research candidate; current structural status needs field-specific verification", "coordinate_verification": "agent-sourced; not independently checked in this pass", "proposed_coordinates_unverified": { "latitude": 25.95806, "longitude": -80.23889, "source": "https://en.wikipedia.org/wiki/Hard_Rock_Stadium" }, "site_id": "mia-sunlife", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 2011, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "timeline_label": "Joe Robbie / Pro Player / Dolphins / Dolphin / Land Shark / Sun Life Stadium (Marlins-era names; exact change dates not encoded)", "published_point": { "latitude": null, "longitude": null, "source": "https://en.wikipedia.org/wiki/Hard_Rock_Stadium" }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Hard_Rock_Stadium" } }, { "venue_id": "mia-loan", "name": "LoanDepot Park", "city": "Miami", "state_or_province": "Florida", "country": "United States", "aliases": [ "Marlins Park", "loanDepot park" ], "opened_year": 2012, "latitude": 25.77806, "longitude": -80.21972, "coordinate_source": "https://en.wikipedia.org/wiki/LoanDepot_Park", "coordinate_confidence": "published stadium point; not surveyed home plate", "site_note": "One physical venue; Marlins Park was the 2012-20 name and loanDepot park from 2021.", "sources": [ "https://en.wikipedia.org/wiki/LoanDepot_Park", "https://www.mlb.com/marlins/history/ballparks", "https://www.mlb.com/news/mlb-parks-from-oldest-to-newest" ], "uncertainties": [], "lifecycle_status": "current regular-season MLB venue in 2026", "coordinate_verification": "directly retrieved through Firecrawl on 2026-10-08", "site_id": "mia-loan", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": null, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": 5, "longitude": 5 }, "coordinate_review_flags": [ "not_home_plate_or_footprint_verified" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": 25.77806, "longitude": -80.21972, "source": "https://en.wikipedia.org/wiki/LoanDepot_Park" }, "map_point": { "latitude": 25.77806, "longitude": -80.21972, "target_type": "Published site point", "status": "Venue point only · home plate unresolved", "source": "https://en.wikipedia.org/wiki/LoanDepot_Park" }, "coordinate_audit": { "franchise": "MIA", "venue_id": "mia-loan", "park_name": "LoanDepot Park", "city": "Miami", "original_latitude": 25.77806, "original_longitude": -80.21972, "original_target_type": "published venue point (Wikipedia, per original dataset); exact target inside venue not specified", "proposed_latitude": null, "proposed_longitude": null, "proposed_target_type": "none - unresolved", "displacement_m": null, "imagery_reference": "Esri World Imagery (ArcGIS tile service, zoom 19, ~0.25-0.30 m/px); tile acquisition dates are not published per-tile by Esri - imagery is a composite and its date is recorded as 'not published' rather than guessed; Bing Maps aerial tiles (zoom 19) as second source", "imagery_date": "not published by provider", "retrieval_date": "2026-10-26", "verification_method": "Roof closed in both Esri World Imagery and Bing aerial; home plate not identifiable from aerial imagery.", "estimated_uncertainty_m": null, "confidence": "unresolved", "source_urls": [ "https://en.wikipedia.org/wiki/LoanDepot_Park", "https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer", "https://www.bing.com/maps (aerial tile service)" ], "review_status": "unresolved - do not use as home plate", "notes": "Retractable roof closed in both available aerial sources. Park name styling: loanDepot park. Original published point retained as a venue point only." }, "current_franchise": "MIA" }, { "venue_id": "pit-exposition-early", "name": "Exposition Parks I / II (early grounds)", "city": "Allegheny (now Pittsburgh)", "state_or_province": "Pennsylvania", "country": "USA", "aliases": [], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": null, "coordinate_confidence": "unresolved", "sources": [ "https://sabr.org/journal/article/a-lot-of-history-at-three-rivers-stadium/" ], "uncertainties": [ "Early Exposition ground boundaries/building identities require further work." ], "site_id": "pit-exposition-early", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "last_mlb_use_in_dataset": 1883, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": null }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": null } }, { "venue_id": "ny-oakland-park", "name": "Oakland Park (Jersey City temporary ground)", "city": "Jersey City, NJ", "aliases": [], "sources": [ "https://en.wikipedia.org/wiki/1889_New_York_Giants_season", "https://en.wikipedia.org/wiki/Polo_Grounds" ], "uncertainties": [], "opened_year": null, "latitude": null, "longitude": null, "coordinate_source": "https://en.wikipedia.org/wiki/Polo_Grounds", "coordinate_verification": "carried from sourced pilot; not re-fetched in this pass", "site_id": "ny-oakland-park", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "coordinate_confidence": "unresolved", "last_mlb_use_in_dataset": 1889, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": "https://en.wikipedia.org/wiki/Polo_Grounds" }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/Polo_Grounds" } }, { "venue_id": "ny-st-george-grounds", "name": "St. George Grounds", "city": "Staten Island, NY", "aliases": [ "Camp Washington site", "St. George Cricket Grounds (common but incorrect label per SABR)" ], "sources": [ "https://en.wikipedia.org/wiki/St._George_Cricket_Grounds", "https://sabr.org/bioproj/park/st-george-grounds/" ], "uncertainties": [], "opened_year": 1886, "latitude": null, "longitude": null, "coordinate_source": "https://en.wikipedia.org/wiki/St._George_Cricket_Grounds", "coordinate_verification": "carried from sourced pilot; not re-fetched in this pass", "site_id": "ny-st-george-grounds", "opened_year_note": "Physical facility/site opening, distinct from first franchise season. Null means not established. Rebuild exceptions are in uncertainties.", "coordinate_confidence": "unresolved", "last_mlb_use_in_dataset": 1889, "scored_pin_approved": false, "coordinate_decimal_places": { "latitude": null, "longitude": null }, "coordinate_review_flags": [ "missing_published_point" ], "display_name_policy": "name is latest researched label; aliases are undated and do not establish a year-specific name", "published_point": { "latitude": null, "longitude": null, "source": "https://en.wikipedia.org/wiki/St._George_Cricket_Grounds" }, "map_point": { "latitude": null, "longitude": null, "target_type": "Published site point", "status": "Approximate site; not verified home plate", "source": "https://en.wikipedia.org/wiki/St._George_Cricket_Grounds" } }, { "venue_id": "nv-las-vegas-ballpark", "site_id": "nv-las-vegas-ballpark", "name": "Las Vegas Ballpark", "city": "Summerlin, Las Vegas", "state_or_province": "Nevada", "country": "USA", "opened_year": 2019, "aliases": [], "latitude": null, "longitude": null, "map_point": { "latitude": null, "longitude": null, "target_type": "Unmapped", "status": "Location not established in this research pass" }, "sources": [ "https://www.mlb.com/news/athletics-las-vegas-series-june-2026" ], "scored_pin_approved": false, "uncertainties": [ "Selected Athletics home games in June 2026; different from the planned Strip stadium." ] } ], "tenancies": [ { "franchise": "ARI", "historical_team_name": "Arizona Diamondbacks", "venue_id": "ari-chase", "first_season": 1998, "last_season": null, "role": "primary", "notes": "Bank One Ballpark was the original name; no spring-training sites included.", "sources": [ "https://www.mlb.com/dbacks/ballpark", "https://www.mlb.com/dbacks/history/timeline" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "ATH", "historical_team_name": "Philadelphia Athletics", "venue_id": "phl-columbia-park", "first_season": 1901, "last_season": 1908, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/athletics/history/ballpark" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "ATH", "historical_team_name": "Philadelphia Athletics", "venue_id": "phl-shibe-park", "first_season": 1909, "last_season": 1954, "role": "primary", "notes": "Shibe Park was renamed Connie Mack Stadium in 1953.", "sources": [ "https://www.mlb.com/athletics/history/ballpark" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "ATH", "historical_team_name": "Kansas City Athletics", "venue_id": "kc-municipal-stadium", "first_season": 1955, "last_season": 1967, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/athletics/history/ballpark" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "ATH", "historical_team_name": "Oakland Athletics", "venue_id": "ath-oak-coliseum", "first_season": 1968, "last_season": 2024, "role": "primary", "notes": "The first Oakland A’s game was April 17, 1968.", "sources": [ "https://www.mlb.com/athletics/history/ballpark" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "ATH", "historical_team_name": "Athletics", "venue_id": "ath-sutter-health-park", "first_season": 2025, "last_season": null, "role": "primary", "notes": "West Sacramento/Sacramento-area home beginning 2025.", "sources": [ "https://www.mlb.com/athletics/history/ballpark" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "ATL", "historical_team_name": "Boston Red Stockings / Boston Braves", "venue_id": "boston-south-end-grounds", "first_season": 1871, "last_season": 1914, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/braves/history/ballpark" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "ATL", "historical_team_name": "Boston Braves", "venue_id": "boston-congress-street-grounds", "first_season": 1894, "last_season": 1894, "role": "temporary_or_alternate", "notes": "", "sources": [ "https://www.mlb.com/braves/history/ballpark" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "ATL", "historical_team_name": "Atlanta Braves", "venue_id": "boston-fenway-park", "first_season": 1913, "last_season": 1913, "role": "temporary_or_alternate", "notes": "Selected Memorial Day home doubleheader, not a full-season residence.", "sources": [ "https://www.mlb.com/braves/history/ballpark" ], "verification": "explicit correction/addition from cited source", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "ATL", "historical_team_name": "Boston Braves", "venue_id": "boston-fenway-park", "first_season": 1914, "last_season": 1915, "role": "temporary_or_alternate", "notes": "Selected home use in 1914–15; the source also mentions postseason games, which are outside this regular-season entry.", "sources": [ "https://www.mlb.com/braves/history/ballpark" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "ATL", "historical_team_name": "Boston Braves", "venue_id": "boston-braves-field", "first_season": 1915, "last_season": 1952, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/braves/history/ballpark" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "ATL", "historical_team_name": "Atlanta Braves", "venue_id": "boston-fenway-park", "first_season": 1946, "last_season": 1946, "role": "temporary_or_alternate", "notes": "Brief displacement after the Braves Field home opener; not a full-season residence.", "sources": [ "https://www.mlb.com/braves/history/ballpark" ], "verification": "explicit correction/addition from cited source", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "ATL", "historical_team_name": "Milwaukee Braves", "venue_id": "mil-county-stadium", "first_season": 1953, "last_season": 1965, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/braves/history/ballpark" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "ATL", "historical_team_name": "Atlanta Braves", "venue_id": "atl-fulton-county", "first_season": 1966, "last_season": 1996, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/braves/history/ballpark" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "ATL", "historical_team_name": "Atlanta Braves", "venue_id": "atl-turner-field", "first_season": 1997, "last_season": 2016, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/braves/history/ballpark" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "ATL", "historical_team_name": "Atlanta Braves", "venue_id": "atl-truist-park", "first_season": 2017, "last_season": null, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/braves/history/ballpark" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "BAL", "historical_team_name": "Milwaukee Brewers", "venue_id": "mil-lloyd-street", "first_season": 1901, "last_season": 1901, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/orioles/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "BAL", "historical_team_name": "St. Louis Browns", "venue_id": "stl-sportsmans-park", "first_season": 1902, "last_season": 1953, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/orioles/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "BAL", "historical_team_name": "Baltimore Orioles", "venue_id": "bal-memorial-stadium", "first_season": 1954, "last_season": 1991, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/orioles/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "BAL", "historical_team_name": "Baltimore Orioles", "venue_id": "bal-camden-yards", "first_season": 1992, "last_season": null, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/orioles/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "BOS", "historical_team_name": "Boston Americans / Boston Red Sox", "venue_id": "boston-huntington-avenue-grounds", "first_season": 1901, "last_season": 1911, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/redsox/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "BOS", "historical_team_name": "Boston Red Sox", "venue_id": "boston-fenway-park", "first_season": 1912, "last_season": null, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/redsox/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "CHC", "historical_team_name": "Chicago White Stockings / Chicago Colts / Chicago Orphans / Chicago Cubs", "venue_id": "cubs-23rd-street-grounds", "first_season": 1876, "last_season": 1877, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/cubs/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "CHC", "historical_team_name": "Chicago White Stockings / Chicago Colts / Chicago Orphans / Chicago Cubs", "venue_id": "cubs-lakefront-park", "first_season": 1878, "last_season": 1884, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/cubs/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "CHC", "historical_team_name": "Chicago White Stockings / Chicago Colts / Chicago Orphans / Chicago Cubs", "venue_id": "cubs-west-side-park-1", "first_season": 1885, "last_season": 1891, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/cubs/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [ "cubs-south-side-park" ] }, { "franchise": "CHC", "historical_team_name": "Chicago White Stockings / Chicago Colts / Chicago Orphans / Chicago Cubs", "venue_id": "cubs-south-side-park", "first_season": 1891, "last_season": 1893, "role": "primary", "notes": "Official Cubs park chronology; 1891 was split between West Side Park and South Side Park.", "sources": [ "https://www.mlb.com/cubs/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [ "cubs-west-side-grounds", "cubs-west-side-park-1" ] }, { "franchise": "CHC", "historical_team_name": "Chicago White Stockings / Chicago Colts / Chicago Orphans / Chicago Cubs", "venue_id": "cubs-west-side-grounds", "first_season": 1893, "last_season": 1915, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/cubs/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [ "cubs-south-side-park" ] }, { "franchise": "CHC", "historical_team_name": "Chicago White Stockings / Chicago Colts / Chicago Orphans / Chicago Cubs", "venue_id": "cubs-wrigley-field", "first_season": 1916, "last_season": null, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/cubs/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "CIN", "historical_team_name": "Cincinnati club / Red Stockings", "venue_id": "cin-bank-street-grounds", "first_season": 1882, "last_season": 1883, "role": "primary", "sources": [ "https://www.mlb.com/reds/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "CIN", "historical_team_name": "Cincinnati Reds", "venue_id": "cin-league-park", "first_season": 1884, "last_season": 1901, "role": "primary", "sources": [ "https://www.mlb.com/reds/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "CIN", "historical_team_name": "Cincinnati Reds", "venue_id": "cin-palace-of-the-fans", "first_season": 1902, "last_season": 1911, "role": "primary", "sources": [ "https://www.mlb.com/reds/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "CIN", "historical_team_name": "Cincinnati Reds", "venue_id": "cin-crosley-field", "first_season": 1912, "last_season": 1970, "role": "primary", "sources": [ "https://www.mlb.com/reds/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [ "cin-riverfront-stadium" ] }, { "franchise": "CIN", "historical_team_name": "Cincinnati Reds", "venue_id": "cin-riverfront-stadium", "first_season": 1970, "last_season": 2002, "role": "primary", "sources": [ "https://www.mlb.com/reds/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [ "cin-crosley-field" ] }, { "franchise": "CIN", "historical_team_name": "Cincinnati Reds", "venue_id": "cin-great-american-ball-park", "first_season": 2003, "last_season": null, "role": "primary", "sources": [ "https://www.mlb.com/reds/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "CLE", "historical_team_name": "Cleveland Infants / Cleveland Indians / Cleveland Guardians", "venue_id": "cleveland-league-park", "first_season": 1901, "last_season": 1932, "role": "primary", "notes": " Shared Cleveland home; resumed 1934–1946. Physical park opened 1891.", "sources": [ "https://www.mlb.com/guardians/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [ "cleveland-stadium" ] }, { "franchise": "CLE", "historical_team_name": "Cleveland Infants / Cleveland Indians / Cleveland Guardians", "venue_id": "cleveland-stadium", "first_season": 1932, "last_season": 1993, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/guardians/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [ "cleveland-league-park" ] }, { "franchise": "CLE", "historical_team_name": "Cleveland Guardians", "venue_id": "cleveland-league-park", "first_season": 1934, "last_season": 1946, "role": "primary", "notes": "Shared with Cleveland Stadium.", "sources": [ "https://sabr.org/bioproj/park/league-park-cleveland/" ], "verification": "explicit correction/addition from cited source", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [ "cleveland-stadium" ] }, { "franchise": "CLE", "historical_team_name": "Cleveland Infants / Cleveland Indians / Cleveland Guardians", "venue_id": "cleveland-progressive-field", "first_season": 1994, "last_season": null, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/guardians/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "COL", "historical_team_name": "Colorado Rockies", "venue_id": "col-milehigh", "first_season": 1993, "last_season": 1994, "role": "primary", "notes": "Mile High was the inaugural temporary home; Coors Field began 1995.", "sources": [ "https://www.mlb.com/rockies/ballpark/history" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "COL", "historical_team_name": "Colorado Rockies", "venue_id": "col-coors", "first_season": 1995, "last_season": null, "role": "primary", "notes": "Mile High was the inaugural temporary home; Coors Field began 1995.", "sources": [ "https://www.mlb.com/rockies/ballpark/history" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "CWS", "historical_team_name": "Chicago White Sox", "venue_id": "sox-south-side-grounds", "first_season": 1901, "last_season": 1910, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/whitesox/ballpark/information/history-and-dimensions" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [ "sox-comiskey-park" ] }, { "franchise": "CWS", "historical_team_name": "Chicago White Sox", "venue_id": "sox-comiskey-park", "first_season": 1910, "last_season": 1990, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/whitesox/ballpark/information/history-and-dimensions" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [ "sox-south-side-grounds" ] }, { "franchise": "CWS", "historical_team_name": "Chicago White Sox", "venue_id": "sox-rate-field", "first_season": 1991, "last_season": null, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/whitesox/ballpark/information/history-and-dimensions" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "DET", "historical_team_name": "Detroit Tigers", "venue_id": "detroit-bennett-park", "first_season": 1901, "last_season": 1911, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/tigers/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "DET", "historical_team_name": "Detroit Tigers", "venue_id": "detroit-tiger-stadium", "first_season": 1912, "last_season": 1999, "role": "primary", "notes": " ", "sources": [ "https://www.mlb.com/tigers/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "DET", "historical_team_name": "Detroit Tigers", "venue_id": "detroit-comerica-park", "first_season": 2000, "last_season": null, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/tigers/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "HOU", "historical_team_name": "Houston Colt .45s", "venue_id": "hou-colt-stadium", "first_season": 1962, "last_season": 1964, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/astros/team/jobs/our-history" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "HOU", "historical_team_name": "Houston Astros", "venue_id": "hou-astrodome", "first_season": 1965, "last_season": 1999, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/astros/team/jobs/our-history" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "HOU", "historical_team_name": "Houston Astros", "venue_id": "hou-minute-maid-park", "first_season": 2000, "last_season": null, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/astros/ballpark/information/facts-and-figures", "https://www.mlb.com/astros/team/jobs/our-history" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "KCR", "historical_team_name": "Kansas City Royals", "venue_id": "kc-municipal-stadium", "first_season": 1969, "last_season": 1972, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/royals/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "KCR", "historical_team_name": "Kansas City Royals", "venue_id": "kc-kauffman-stadium", "first_season": 1973, "last_season": null, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/royals/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "LAA", "historical_team_name": "Los Angeles Angels", "venue_id": "ang-wrigley-la", "first_season": 1961, "last_season": 1961, "role": "primary", "notes": "Franchise was called Los Angeles Angels in 1961.", "sources": [ "https://www.mlb.com/angels/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "LAA", "historical_team_name": "Los Angeles Angels", "venue_id": "lad-dodger-stadium", "first_season": 1962, "last_season": 1965, "role": "primary", "notes": "California Angels name began in 1965; split below. ", "sources": [ "https://www.mlb.com/angels/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "LAA", "historical_team_name": "California Angels", "venue_id": "ang-angel", "first_season": 1966, "last_season": null, "role": "primary", "notes": "Venue originally Anaheim Stadium. Venue was Edison International Field from 1997. ", "sources": [ "https://www.mlb.com/angels/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "LAD", "historical_team_name": "Brooklyn Atlantics / Brooklyn Bridegrooms", "venue_id": "brooklyn-washington-park-i", "first_season": 1884, "last_season": 1890, "role": "primary", "notes": "The official page describes the franchise name and its 1889 fire/rebuild. Current franchise played here in 1883 before major-league AA entry in 1884.", "sources": [ "https://www.mlb.com/dodgers/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "LAD", "historical_team_name": "Brooklyn Bridegrooms", "venue_id": "brooklyn-ridgewood-park", "first_season": 1886, "last_season": 1889, "role": "temporary_or_alternate", "notes": "Sunday home games; not an exhaustive neutral/exhibition listing.", "sources": [ "https://www.mlb.com/dodgers/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "LAD", "historical_team_name": "Brooklyn Bridegrooms / Brooklyn Grooms", "venue_id": "brooklyn-eastern-park", "first_season": 1891, "last_season": 1897, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/dodgers/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "LAD", "historical_team_name": "Brooklyn Superbas / Brooklyn Dodgers", "venue_id": "brooklyn-washington-park-ii", "first_season": 1898, "last_season": 1912, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/dodgers/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "LAD", "historical_team_name": "Brooklyn Dodgers", "venue_id": "brooklyn-ebbets-field", "first_season": 1913, "last_season": 1957, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/dodgers/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "LAD", "historical_team_name": "Brooklyn Dodgers", "venue_id": "jersey-city-roosevelt-stadium", "first_season": 1956, "last_season": 1957, "role": "temporary_or_alternate", "notes": "Seven home games in each of 1956 and 1957; not a full-season replacement.", "sources": [ "https://www.mlb.com/dodgers/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "LAD", "historical_team_name": "Los Angeles Dodgers", "venue_id": "lad-coliseum", "first_season": 1958, "last_season": 1961, "role": "primary", "notes": "Four seasons while Dodger Stadium was being built.", "sources": [ "https://www.mlb.com/dodgers/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "LAD", "historical_team_name": "Los Angeles Dodgers", "venue_id": "lad-dodger-stadium", "first_season": 1962, "last_season": null, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/dodgers/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "MIA", "historical_team_name": "Florida Marlins", "venue_id": "mia-sunlife", "first_season": 1993, "last_season": 2011, "role": "primary", "notes": "Venue had multiple sponsor names: Joe Robbie, Pro Player, and Sun Life.", "sources": [ "https://www.mlb.com/marlins/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "MIA", "historical_team_name": "Miami Marlins", "venue_id": "mia-loan", "first_season": 2012, "last_season": null, "role": "primary", "notes": "The physical park was named Marlins Park. The physical park was renamed loanDepot park.", "sources": [ "https://www.mlb.com/marlins/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "MIL", "historical_team_name": "Seattle Pilots", "venue_id": "sea-sicks-stadium", "first_season": 1969, "last_season": 1969, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/brewers/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "MIL", "historical_team_name": "Milwaukee Brewers", "venue_id": "mil-county-stadium", "first_season": 1970, "last_season": 2000, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/brewers/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "MIL", "historical_team_name": "Milwaukee Brewers", "venue_id": "mil-american-family-field", "first_season": 2001, "last_season": null, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/brewers/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "MIN", "historical_team_name": "Washington Senators (original franchise)", "venue_id": "dc-american-league-park", "first_season": 1901, "last_season": 1904, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/twins/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "MIN", "historical_team_name": "Washington Senators (original franchise)", "venue_id": "dc-national-park", "first_season": 1905, "last_season": 1910, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/twins/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "MIN", "historical_team_name": "Washington Senators (original franchise)", "venue_id": "dc-griffith-stadium", "first_season": 1911, "last_season": 1960, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/twins/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "MIN", "historical_team_name": "Minnesota Twins", "venue_id": "min-metropolitan-stadium", "first_season": 1961, "last_season": 1981, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/twins/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "MIN", "historical_team_name": "Minnesota Twins", "venue_id": "min-metrodome", "first_season": 1982, "last_season": 2009, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/twins/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "MIN", "historical_team_name": "Minnesota Twins", "venue_id": "min-target-field", "first_season": 2010, "last_season": null, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/twins/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "NYM", "historical_team_name": "New York Mets", "venue_id": "ny-polo-grounds-final", "first_season": 1962, "last_season": 1963, "role": "primary", "notes": "", "sources": [ "https://www.baseball-reference.com/teams/NYM/index.shtml" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "NYM", "historical_team_name": "New York Mets", "venue_id": "ny-shea-stadium", "first_season": 1964, "last_season": 2008, "role": "primary", "notes": "", "sources": [ "https://www.baseball-reference.com/teams/NYM/index.shtml" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "NYM", "historical_team_name": "New York Mets", "venue_id": "queens-citi-field", "first_season": 2009, "last_season": null, "role": "primary", "notes": "", "sources": [ "https://www.baseball-reference.com/teams/NYM/index.shtml" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "NYY", "historical_team_name": "New York Highlanders / New York Yankees", "venue_id": "ny-hilltop-park", "first_season": 1903, "last_season": 1912, "role": "primary", "notes": "", "sources": [ "https://www.baseball-reference.com/teams/NYY/index.shtml" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "NYY", "historical_team_name": "New York Yankees", "venue_id": "ny-polo-grounds-final", "first_season": 1913, "last_season": 1922, "role": "primary", "notes": "", "sources": [ "https://www.baseball-reference.com/teams/NYY/index.shtml" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "NYY", "historical_team_name": "New York Yankees", "venue_id": "ny-yankee-stadium-1923", "first_season": 1923, "last_season": 1973, "role": "primary", "notes": "", "sources": [ "https://www.baseball-reference.com/teams/NYY/index.shtml" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "NYY", "historical_team_name": "New York Yankees", "venue_id": "ny-shea-stadium", "first_season": 1974, "last_season": 1975, "role": "temporary_or_alternate", "notes": "Yankee Stadium reconstruction.", "sources": [ "https://www.baseball-reference.com/teams/NYY/index.shtml" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "NYY", "historical_team_name": "New York Yankees", "venue_id": "ny-yankee-stadium-1923", "first_season": 1976, "last_season": 2008, "role": "primary", "notes": "", "sources": [ "https://www.baseball-reference.com/teams/NYY/index.shtml" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "NYY", "historical_team_name": "New York Yankees", "venue_id": "ny-yankee-stadium-2009", "first_season": 2009, "last_season": null, "role": "primary", "notes": "", "sources": [ "https://www.baseball-reference.com/teams/NYY/index.shtml" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "PHI", "historical_team_name": "Philadelphia Phillies", "venue_id": "phl-recreation-park", "first_season": 1883, "last_season": 1886, "role": "primary", "sources": [ "https://www.mlb.com/phillies/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "PHI", "historical_team_name": "Philadelphia Phillies", "venue_id": "phl-baker-bowl", "first_season": 1887, "last_season": 1938, "role": "primary", "sources": [ "https://www.mlb.com/phillies/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [ "phl-shibe-park" ] }, { "franchise": "PHI", "historical_team_name": "Philadelphia Phillies", "venue_id": "phl-upenn-grounds", "first_season": 1894, "last_season": 1894, "role": "temporary_or_alternate", "sources": [ "https://www.mlb.com/phillies/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "PHI", "historical_team_name": "Philadelphia Phillies", "venue_id": "phl-columbia-park", "first_season": 1903, "last_season": 1903, "role": "temporary_or_alternate", "sources": [ "https://www.mlb.com/phillies/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "PHI", "historical_team_name": "Philadelphia Phillies", "venue_id": "phl-shibe-park", "first_season": 1927, "last_season": 1927, "role": "temporary_or_alternate", "notes": "Selected temporary Phillies games before permanent 1938 move.", "sources": [ "https://www.mlb.com/phillies/history/ballparks" ], "verification": "explicit correction/addition from cited source", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "PHI", "historical_team_name": "Philadelphia Phillies", "venue_id": "phl-shibe-park", "first_season": 1938, "last_season": 1970, "role": "primary", "sources": [ "https://www.mlb.com/phillies/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [ "phl-baker-bowl" ] }, { "franchise": "PHI", "historical_team_name": "Philadelphia Phillies", "venue_id": "phl-veterans-stadium", "first_season": 1971, "last_season": 2003, "role": "primary", "sources": [ "https://www.mlb.com/phillies/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "PHI", "historical_team_name": "Philadelphia Phillies", "venue_id": "phl-citizens-bank-park", "first_season": 2004, "last_season": null, "role": "primary", "sources": [ "https://www.mlb.com/phillies/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "PIT", "historical_team_name": "Pittsburgh Pirates", "venue_id": "pit-exposition-early", "first_season": 1882, "last_season": 1883, "role": "primary", "notes": "Early Exposition grounds, distinct from Exposition Park III.", "sources": [ "https://sabr.org/journal/article/a-lot-of-history-at-three-rivers-stadium/" ], "verification": "explicit correction/addition from cited source", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "PIT", "historical_team_name": "Pittsburgh Alleghenys / Pittsburgh Pirates", "venue_id": "pit-recreation-park", "first_season": 1884, "last_season": 1890, "role": "primary", "notes": "", "sources": [ "https://en.wikipedia.org/wiki/Exposition_Park_(Pittsburgh)", "https://sabr.org/journal/article/a-lot-of-history-at-three-rivers-stadium/" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "PIT", "historical_team_name": "Pittsburgh Alleghenys / Pittsburgh Pirates", "venue_id": "pit-exposition-park", "first_season": 1891, "last_season": 1909, "role": "primary", "notes": "", "sources": [ "https://en.wikipedia.org/wiki/Exposition_Park_(Pittsburgh)", "https://sabr.org/journal/article/a-lot-of-history-at-three-rivers-stadium/" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [ "pit-forbes-field" ] }, { "franchise": "PIT", "historical_team_name": "Pittsburgh Pirates", "venue_id": "pit-forbes-field", "first_season": 1909, "last_season": 1970, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/pirates/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [ "pit-exposition-park", "pit-three-rivers" ] }, { "franchise": "PIT", "historical_team_name": "Pittsburgh Pirates", "venue_id": "pit-three-rivers", "first_season": 1970, "last_season": 2000, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/pirates/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [ "pit-forbes-field" ] }, { "franchise": "PIT", "historical_team_name": "Pittsburgh Pirates", "venue_id": "pit-pnc-park", "first_season": 2001, "last_season": null, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/pirates/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "SDP", "historical_team_name": "San Diego Padres", "venue_id": "sd-stadium", "first_season": 1969, "last_season": 2003, "role": "primary", "notes": "The MLB franchise begins in 1969; earlier PCL Padres parks are out of scope.", "sources": [ "https://en.wikipedia.org/wiki/Petco_Park", "https://en.wikipedia.org/wiki/San_Diego_Stadium" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "SDP", "historical_team_name": "San Diego Padres", "venue_id": "sd-petco", "first_season": 2004, "last_season": null, "role": "primary", "notes": "The MLB franchise begins in 1969; earlier PCL Padres parks are out of scope.", "sources": [ "https://en.wikipedia.org/wiki/Petco_Park", "https://en.wikipedia.org/wiki/San_Diego_Stadium" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "SEA", "historical_team_name": "Seattle Mariners", "venue_id": "sea-kingdome", "first_season": 1977, "last_season": 1999, "role": "primary", "notes": "1999 is a transition season: Kingdome through June, new park from July.", "sources": [ "https://www.mlb.com/mariners/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [ "sea-tmobile" ] }, { "franchise": "SEA", "historical_team_name": "Seattle Mariners", "venue_id": "sea-tmobile", "first_season": 1999, "last_season": null, "role": "primary", "notes": "1999 is a transition season: Kingdome through June, new park from July.", "sources": [ "https://www.mlb.com/mariners/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [ "sea-kingdome" ] }, { "franchise": "SFG", "historical_team_name": "New York Gothams", "venue_id": "ny-polo-grounds-i", "first_season": 1883, "last_season": 1888, "role": "primary", "notes": " ", "sources": [ "https://www.mlb.com/giants/history/ballpark" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "SFG", "historical_team_name": "San Francisco Giants", "venue_id": "ny-oakland-park", "first_season": 1889, "last_season": 1889, "role": "temporary_or_alternate", "notes": "Temporary Giants home from pilot; exact game allocation needs follow-up.", "sources": [ "https://en.wikipedia.org/wiki/1889_New_York_Giants_season" ], "verification": "explicit correction/addition from cited source", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "SFG", "historical_team_name": "New York Giants", "venue_id": "ny-polo-grounds-ii", "first_season": 1889, "last_season": 1890, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/giants/history/ballpark" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "SFG", "historical_team_name": "San Francisco Giants", "venue_id": "ny-st-george-grounds", "first_season": 1889, "last_season": 1889, "role": "temporary_or_alternate", "notes": "Temporary Giants home from pilot; exact game allocation needs follow-up.", "sources": [ "https://en.wikipedia.org/wiki/St._George_Cricket_Grounds" ], "verification": "explicit correction/addition from cited source", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "SFG", "historical_team_name": "New York Giants", "venue_id": "ny-polo-grounds-final", "first_season": 1891, "last_season": 1957, "role": "primary", "notes": "Polo Grounds III/IV is modeled as one field identity; IV was rebuilt on the same site in 1911.", "sources": [ "https://www.mlb.com/giants/history/ballpark" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "SFG", "historical_team_name": "San Francisco Giants", "venue_id": "ny-hilltop-park", "first_season": 1911, "last_season": 1911, "role": "temporary_or_alternate", "notes": "Temporary Giants home after Polo Grounds fire.", "sources": [ "https://www.mlb.com/giants/history/ballpark" ], "verification": "explicit correction/addition from cited source", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "SFG", "historical_team_name": "San Francisco Giants", "venue_id": "sf-seals-stadium", "first_season": 1958, "last_season": 1959, "role": "primary", "notes": "Temporary home while Candlestick Park was completed.", "sources": [ "https://www.mlb.com/giants/history/ballpark" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "SFG", "historical_team_name": "San Francisco Giants", "venue_id": "sf-candlestick-park", "first_season": 1960, "last_season": 1999, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/giants/history/ballpark" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "SFG", "historical_team_name": "San Francisco Giants", "venue_id": "sf-oracle-park", "first_season": 2000, "last_season": null, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/giants/history/ballpark" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "STL", "historical_team_name": "St. Louis Brown Stockings / St. Louis Cardinals", "venue_id": "stl-sportsmans-park", "first_season": 1882, "last_season": 1892, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/cardinals/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "STL", "historical_team_name": "St. Louis Brown Stockings / St. Louis Cardinals", "venue_id": "stl-robison-field", "first_season": 1893, "last_season": 1920, "role": "primary", "notes": "", "sources": [ "https://sabr.org/bioproj/park/robison-field-st-louis/", "https://www.mlb.com/cardinals/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [ "stl-sportsmans-park" ] }, { "franchise": "STL", "historical_team_name": "St. Louis Brown Stockings / St. Louis Cardinals", "venue_id": "stl-sportsmans-park", "first_season": 1920, "last_season": 1966, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/cardinals/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [ "stl-busch-memorial", "stl-robison-field" ] }, { "franchise": "STL", "historical_team_name": "St. Louis Brown Stockings / St. Louis Cardinals", "venue_id": "stl-busch-memorial", "first_season": 1966, "last_season": 2005, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/cardinals/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [ "stl-sportsmans-park" ] }, { "franchise": "STL", "historical_team_name": "St. Louis Brown Stockings / St. Louis Cardinals", "venue_id": "stl-busch-stadium-iii", "first_season": 2006, "last_season": null, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/cardinals/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "TBR", "historical_team_name": "Tampa Bay Devil Rays", "venue_id": "tb-tropicana-field", "first_season": 1998, "last_season": 2024, "role": "primary", "notes": " ", "sources": [ "https://www.mlb.com/news/ballparks-where-the-rays-have-been-the-home-team", "https://www.mlb.com/news/rays-2025-steinbrenner-field", "https://www.mlb.com/rays/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "TBR", "historical_team_name": "Tampa Bay Rays", "venue_id": "tb-steinbrenner-field", "first_season": 2025, "last_season": 2025, "role": "primary", "notes": "All 2025 home games were played here after Tropicana Field damage.", "sources": [ "https://www.mlb.com/news/ballparks-where-the-rays-have-been-the-home-team", "https://www.mlb.com/news/rays-2025-steinbrenner-field", "https://www.mlb.com/rays/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "TBR", "historical_team_name": "Tampa Bay Rays", "venue_id": "tb-tropicana-field", "first_season": 2026, "last_season": null, "role": "primary", "notes": "Return to Tropicana Field in 2026.", "sources": [ "https://www.mlb.com/news/ballparks-where-the-rays-have-been-the-home-team", "https://www.mlb.com/news/rays-2025-steinbrenner-field", "https://www.mlb.com/rays/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "TEX", "historical_team_name": "Washington Senators (expansion franchise)", "venue_id": "dc-griffith-stadium", "first_season": 1961, "last_season": 1961, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/rangers/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "TEX", "historical_team_name": "Washington Senators (expansion franchise)", "venue_id": "was-rfk-stadium", "first_season": 1962, "last_season": 1971, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/rangers/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "TEX", "historical_team_name": "Texas Rangers", "venue_id": "arlington-stadium", "first_season": 1972, "last_season": 1993, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/rangers/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "TEX", "historical_team_name": "Texas Rangers", "venue_id": "rangers-ballpark-arlington", "first_season": 1994, "last_season": 2019, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/rangers/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "TEX", "historical_team_name": "Texas Rangers", "venue_id": "rangers-globe-life-field", "first_season": 2020, "last_season": null, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/rangers/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "TOR", "historical_team_name": "Toronto Blue Jays", "venue_id": "tor-exhibition-stadium", "first_season": 1977, "last_season": 1989, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/bluejays/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [ "tor-rogers-centre" ] }, { "franchise": "TOR", "historical_team_name": "Toronto Blue Jays", "venue_id": "tor-rogers-centre", "first_season": 1989, "last_season": 2019, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/bluejays/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [ "tor-exhibition-stadium" ] }, { "franchise": "TOR", "historical_team_name": "Toronto Blue Jays", "venue_id": "tor-sahlen-field", "first_season": 2020, "last_season": 2020, "role": "temporary_or_alternate", "notes": "Pandemic relocation.", "sources": [ "https://www.mlb.com/bluejays/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "TOR", "historical_team_name": "Toronto Blue Jays", "venue_id": "tor-rogers-centre", "first_season": 2021, "last_season": null, "role": "primary", "notes": "Returned July 30, 2021 after temporary US homes.", "sources": [ "https://www.mlb.com/bluejays/history/ballparks", "https://www.mlb.com/news/blue-jays-returning-to-toronto-on-july-30" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "TOR", "historical_team_name": "Toronto Blue Jays", "venue_id": "tor-sahlen-field", "first_season": 2021, "last_season": 2021, "role": "temporary_or_alternate", "notes": "Pandemic relocation.", "sources": [ "https://www.mlb.com/bluejays/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "TOR", "historical_team_name": "Toronto Blue Jays", "venue_id": "tor-td-ballpark", "first_season": 2021, "last_season": 2021, "role": "temporary_or_alternate", "notes": "Pandemic relocation; team also returned to Buffalo later in 2021.", "sources": [ "https://www.mlb.com/bluejays/history/ballparks" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "WSN", "historical_team_name": "Montreal Expos", "venue_id": "mon-jarry-park", "first_season": 1969, "last_season": 1976, "role": "primary", "notes": "", "sources": [ "https://www.baseball-reference.com/teams/WSN/index.shtml" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "WSN", "historical_team_name": "Montreal Expos", "venue_id": "mon-olympic-stadium", "first_season": 1977, "last_season": 2004, "role": "primary", "notes": "", "sources": [ "https://www.baseball-reference.com/teams/WSN/index.shtml" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "WSN", "historical_team_name": "Montreal Expos", "venue_id": "mon-hiram-bithorn", "first_season": 2003, "last_season": 2004, "role": "temporary_or_alternate", "notes": "", "sources": [ "https://www.baseball-reference.com/teams/WSN/index.shtml" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "WSN", "historical_team_name": "Washington Nationals", "venue_id": "was-rfk-stadium", "first_season": 2005, "last_season": 2007, "role": "primary", "notes": "", "sources": [ "https://www.baseball-reference.com/teams/WSN/index.shtml" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "WSN", "historical_team_name": "Washington Nationals", "venue_id": "was-nationals-park", "first_season": 2008, "last_season": null, "role": "primary", "notes": "", "sources": [ "https://www.baseball-reference.com/teams/WSN/index.shtml" ], "verification": "chain reviewed against source pages; exact game dates/counts not audited", "date_precision": "inclusive seasons; transitions within a season are allowed", "overlapping_primary_venue_ids": [] }, { "franchise": "ATH", "historical_team_name": "Athletics", "venue_id": "nv-las-vegas-ballpark", "first_season": 2026, "last_season": 2026, "role": "temporary_or_alternate", "notes": "Six selected home games, June 8–10 and June 12–14, 2026; Sutter remains the primary home.", "sources": [ "https://www.mlb.com/news/athletics-las-vegas-series-june-2026" ], "date_precision": "Selected games within the 2026 season" } ], "coverage": [ { "franchise": "ARI", "name": "Arizona Diamondbacks", "first_season_in_dataset": 1998, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "ATH", "name": "Athletics", "first_season_in_dataset": 1901, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "ATL", "name": "Atlanta Braves", "first_season_in_dataset": 1871, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "BAL", "name": "Baltimore Orioles", "first_season_in_dataset": 1901, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "BOS", "name": "Boston Red Sox", "first_season_in_dataset": 1901, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "CHC", "name": "Chicago Cubs", "first_season_in_dataset": 1876, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "CIN", "name": "Cincinnati Reds", "first_season_in_dataset": 1882, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "CLE", "name": "Cleveland Guardians", "first_season_in_dataset": 1901, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "COL", "name": "Colorado Rockies", "first_season_in_dataset": 1993, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "CWS", "name": "Chicago White Sox", "first_season_in_dataset": 1901, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "DET", "name": "Detroit Tigers", "first_season_in_dataset": 1901, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "HOU", "name": "Houston Astros", "first_season_in_dataset": 1962, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "KCR", "name": "Kansas City Royals", "first_season_in_dataset": 1969, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "LAA", "name": "Los Angeles Angels", "first_season_in_dataset": 1961, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "LAD", "name": "Los Angeles Dodgers", "first_season_in_dataset": 1884, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "MIA", "name": "Miami Marlins", "first_season_in_dataset": 1993, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "MIL", "name": "Milwaukee Brewers", "first_season_in_dataset": 1969, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "MIN", "name": "Minnesota Twins", "first_season_in_dataset": 1901, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "NYM", "name": "New York Mets", "first_season_in_dataset": 1962, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "NYY", "name": "New York Yankees", "first_season_in_dataset": 1903, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "PHI", "name": "Philadelphia Phillies", "first_season_in_dataset": 1883, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "PIT", "name": "Pittsburgh Pirates", "first_season_in_dataset": 1882, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "SDP", "name": "San Diego Padres", "first_season_in_dataset": 1969, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "SEA", "name": "Seattle Mariners", "first_season_in_dataset": 1977, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "SFG", "name": "San Francisco Giants", "first_season_in_dataset": 1883, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "STL", "name": "St. Louis Cardinals", "first_season_in_dataset": 1882, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "TBR", "name": "Tampa Bay Rays", "first_season_in_dataset": 1998, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "TEX", "name": "Texas Rangers", "first_season_in_dataset": 1961, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "TOR", "name": "Toronto Blue Jays", "first_season_in_dataset": 1977, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" }, { "franchise": "WSN", "name": "Washington Nationals", "first_season_in_dataset": 1969, "review_status": "major home chain assembled; not an exhaustive game-by-game or all-leagues audit" } ], "excluded_context": [ { "franchise": "Cincinnati Reds", "historical_team_name": "Cincinnati professional club", "venue_id": "cin-union-grounds", "first_season": 1869, "last_season": 1870, "role": "main", "sources": [ "https://www.mlb.com/reds/history/ballparks" ], "reason": "Earlier club/context; excluded from current-franchise chain" }, { "franchise": "Cincinnati Reds", "historical_team_name": "Cincinnati club", "venue_id": "cin-avenue-grounds", "first_season": 1876, "last_season": 1879, "role": "main", "sources": [ "https://www.mlb.com/reds/history/ballparks" ], "reason": "Earlier club/context; excluded from current-franchise chain" }, { "franchise": "Dodgers", "historical_team_name": "Brooklyn Atlantics", "venue_id": "lad_capitoline", "first_season": 1862, "last_season": 1878, "role": "primary", "notes": "", "sources": [ "https://www.mlb.com/dodgers/history/ballparks" ], "reason": "Earlier club/context; excluded from current-franchise chain" } ], "pilot_background_sites": [ { "id": "brooklyn-capitoline-skating-lake", "name": "Capitoline Skating Lake and Base-Ball Ground", "aliases": [ "Capitoline Grounds" ], "city": "Brooklyn, New York", "opening_year": 1862, "last_mlb_use_year": null, "demolition_year": 1879, "status": "former Brooklyn baseball ground; developed into street/urban blocks", "coordinates": null, "coordinate_source": "No coordinate supplied by fetched source", "coordinate_confidence": "none", "current_site_use": null, "current_site_use_source": null, "tenants": [ { "tenant": "Brooklyn Atlantics; broader Brooklyn baseball context, not established Dodgers franchise continuity" } ], "predecessor_successor": { "predecessor": null, "successor": null }, "historical_note": "Listed in the Dodgers' broad city ballpark history; excluded from Dodgers franchise chain pending independent continuity verification.", "source_urls": [ "https://www.mlb.com/dodgers/history/ballparks" ], "uncertainties_or_omissions": "Exact current parcel use not established in fetched sources." } ], "outstanding_verification": [ "Historic coordinates are not yet validated against parcel maps or historic plans.", "Early Chicago Lakefront and Pittsburgh Exposition building identities need refinement.", "Cubs pre-1876 NA grounds and Yankees Baltimore-rights precursor are outside the main chain.", "Selected-home exceptions are incomplete: Rays Disney/Citi and other neutral/displaced series need game-level audit.", "Current capacities intentionally omitted: year and seating configuration matter.", "Non-current physical opening dates are selective; unknown years remain null.", "Sportsman’s Park and Polo Grounds rebuild generations are aggregated at site level.", "Historic demolition and present-day site use are not certified by this dataset." ], "validation": { "venues": 112, "tenancies": 134, "current_parks": 30, "corrected_proposals": 9, "new_york_sites": 8, "scored_pins_approved": 0 } }