{"sport":"mlb","slug":"don-cooper","bio":{"fullName":"Don Cooper","position":"P","team":"NYY","heightInches":73,"weightLbs":185,"birthDate":"1956-01-15","rookieSeason":1981,"lastSeason":1985,"status":"RET","externalIds":{"mlbam":"112653","chadwick":"ecd1956b","retro":"coopd001","wikidata":"Q2420751"}},"draft":{"year":1978,"round":null,"pick":null,"team":null,"undrafted":false},"statTables":[{"id":"pitching","label":"Pitching","columns":[{"key":"g"},{"key":"gs"},{"key":"w"},{"key":"l"},{"key":"sv"},{"key":"ip"},{"key":"so"},{"key":"bb"},{"key":"h"},{"key":"er"},{"key":"hr"},{"key":"era"},{"key":"whip"}],"rows":[{"season":1981,"seasonType":"REG","team":"MIN","gamesPlayed":27,"values":{"g":27,"gs":2,"w":1,"l":5,"sv":0,"ip":58.2,"so":33,"bb":32,"h":61,"er":28,"hr":9,"era":4.3,"whip":1.59},"rowScope":"team"},{"season":1982,"seasonType":"REG","team":"MIN","gamesPlayed":6,"values":{"g":6,"gs":1,"w":0,"l":1,"sv":0,"ip":11.1,"so":5,"bb":11,"h":14,"er":12,"hr":0,"era":9.53,"whip":2.21},"rowScope":"team"},{"season":1983,"seasonType":"REG","team":"TOR","gamesPlayed":4,"values":{"g":4,"gs":0,"w":0,"l":0,"sv":0,"ip":5.1,"so":5,"bb":0,"h":8,"er":4,"hr":3,"era":6.75,"whip":1.5},"rowScope":"team"},{"season":1985,"seasonType":"REG","team":"NYY","gamesPlayed":7,"values":{"g":7,"gs":0,"w":0,"l":0,"sv":0,"ip":10,"so":4,"bb":3,"h":12,"er":6,"hr":2,"era":5.4,"whip":1.5},"rowScope":"team"}],"careerTotals":{"REG":{"g":44,"gs":3,"w":1,"l":6,"sv":0,"ip":85.1,"so":47,"bb":46,"h":95,"er":50,"hr":14,"era":5.27,"whip":1.65}}},{"id":"advanced","label":"Advanced (League-Relative)","columns":[{"key":"ops_plus","label":"OPS+","description":"On-base plus slugging vs the player's own season+league (100 = league average). Park-unadjusted; OBP uses a consistent (H+BB)/(AB+BB) rate. Higher is better.","format":"int","higherIsBetter":true},{"key":"era_plus","label":"ERA+","description":"Earned-run average vs the player's own season+league (100 = league average). Park-unadjusted. Higher is better.","format":"int","higherIsBetter":true}],"rows":[{"season":1981,"seasonType":"REG","team":"MIN","values":{"ops_plus":null,"era_plus":83},"rowScope":"team"},{"season":1982,"seasonType":"REG","team":"MIN","values":{"ops_plus":null,"era_plus":42},"rowScope":"team"},{"season":1983,"seasonType":"REG","team":"TOR","values":{"ops_plus":null,"era_plus":59},"rowScope":"team"},{"season":1985,"seasonType":"REG","team":"NYY","values":{"ops_plus":null,"era_plus":74},"rowScope":"team"}],"careerTotals":{"REG":{"ops_plus":null,"era_plus":71}},"advancedMeta":{"method":"computed in-house from MLB StatsAPI season batting/pitching lines, normalized to each player's own (season, league) baseline","formulas":{"era_plus":"100 * lgERA / playerERA (league ERA = 9 * ΣER / ΣIP over the season+league)","ops_plus":"100 * (OBP/lgOBP + SLG/lgSLG - 1)","career_era_plus":"innings-weighted league ERA / career ERA (B-Ref method)","career_ops_plus":"AB-weighted OBP & SLG against AB-weighted league rates"},"caveats":["PARK-UNADJUSTED: no park-factor data exists in the corpus, so these are league-relative but not park-adjusted (true B-Ref ERA+/OPS+ also divide by a park factor)","OBP baseline uses a consistent (H+BB)/(AB+BB) reached-base rate for BOTH player and league — the source feed carries no HBP or SF, so this is not the full (H+BB+HBP)/(AB+BB+HBP+SF) OBP; SLG is exact from the hit-type columns","league resolved from team code + season (most-recently-founded franchise existing by that season); the same resolver builds the baseline and looks up the player, so ratios stay internally coherent","a (season, league) bucket below the sample floor (3000 AB batting / 1000 IP pitching) yields null — no noisy baselines","regular season only; postseason lines are excluded from league baselines and metrics","AL and NL and each historical/Negro league are normalized separately — never blended across leagues or eras"]}}],"dataSources":["MLB StatsAPI (statsapi.mlb.com — official public league API; facts only, raw payloads not republished)"],"generatedAt":"2026-07-03T02:49:47.141Z"}