{"sport":"mlb","slug":"percy-bailey","bio":{"fullName":"Percy Bailey","position":"X","team":null,"heightInches":66,"weightLbs":140,"birthDate":"1904-11-15","rookieSeason":1933,"lastSeason":1934,"status":"RET","externalIds":{"mlbam":"820618","chadwick":"931d43a6","retro":"bailp101","wikidata":"Q104520565"}},"draft":null,"statTables":[{"id":"batting","label":"Batting","columns":[{"key":"g"},{"key":"ab"},{"key":"r"},{"key":"h"},{"key":"doubles"},{"key":"triples"},{"key":"hr"},{"key":"rbi"},{"key":"sb"},{"key":"bb"},{"key":"so"},{"key":"avg"},{"key":"obp"},{"key":"slg"},{"key":"ops"}],"rows":[{"season":1933,"seasonType":"REG","gamesPlayed":10,"gamesStarted":null,"values":{"g":10,"ab":32,"r":1,"h":7,"doubles":0,"triples":0,"hr":0,"rbi":1,"sb":0,"bb":1,"so":null,"avg":0.219,"slg":0.219,"obp":null,"ops":null},"team":"TOT","rowScope":"total"},{"season":1933,"seasonType":"REG","team":"Indianapolis ABC's","gamesPlayed":7,"values":{"g":7,"ab":24,"r":1,"h":6,"doubles":0,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":0,"so":null,"avg":0.25,"obp":0.25,"slg":0.25,"ops":0.5},"rowScope":"team"},{"season":1933,"seasonType":"REG","team":"Nashville Elite Giants","gamesPlayed":3,"values":{"g":3,"ab":8,"r":0,"h":1,"doubles":0,"triples":0,"hr":0,"rbi":1,"sb":0,"bb":1,"so":null,"avg":0.125,"obp":0.222,"slg":0.125,"ops":0.347},"rowScope":"team"},{"season":1934,"seasonType":"REG","team":"Cole's American Giants","gamesPlayed":9,"values":{"g":9,"ab":14,"r":2,"h":3,"doubles":0,"triples":1,"hr":0,"rbi":2,"sb":0,"bb":1,"so":null,"avg":0.214,"obp":0.267,"slg":0.357,"ops":0.624},"rowScope":"team"}],"careerTotals":{"REG":{"g":19,"ab":46,"r":3,"h":10,"doubles":0,"triples":1,"hr":0,"rbi":3,"sb":0,"bb":2,"so":null,"avg":0.217,"obp":0.25,"slg":0.261,"ops":0.511}}},{"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":1933,"seasonType":"REG","gamesPlayed":10,"gamesStarted":null,"values":{"g":10,"gs":9,"w":3,"l":5,"sv":0,"so":38,"bb":24,"h":73,"er":28,"hr":5,"ip":68.2,"era":3.67,"whip":1.41},"team":"TOT","rowScope":"total"},{"season":1933,"seasonType":"REG","team":"Indianapolis ABC's","gamesPlayed":7,"values":{"g":7,"gs":7,"w":2,"l":4,"sv":0,"ip":51,"so":26,"bb":16,"h":52,"er":18,"hr":4,"era":3.18,"whip":1.33},"rowScope":"team"},{"season":1933,"seasonType":"REG","team":"Nashville Elite Giants","gamesPlayed":3,"values":{"g":3,"gs":2,"w":1,"l":1,"sv":0,"ip":17.2,"so":12,"bb":8,"h":21,"er":10,"hr":1,"era":5.09,"whip":1.64},"rowScope":"team"},{"season":1934,"seasonType":"REG","team":"Cole's American Giants","gamesPlayed":9,"values":{"g":9,"gs":4,"w":1,"l":3,"sv":0,"ip":39.1,"so":17,"bb":15,"h":56,"er":37,"hr":4,"era":8.47,"whip":1.81},"rowScope":"team"}],"careerTotals":{"REG":{"g":19,"gs":13,"w":4,"l":8,"sv":0,"ip":108,"so":55,"bb":39,"h":129,"er":65,"hr":9,"era":5.42,"whip":1.56}}},{"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":1933,"seasonType":"REG","gamesPlayed":null,"gamesStarted":null,"values":{"ops_plus":null,"era_plus":null},"team":"TOT","rowScope":"total"},{"season":1933,"seasonType":"REG","team":"Indianapolis ABC's","values":{"ops_plus":42,"era_plus":132},"rowScope":"team"},{"season":1933,"seasonType":"REG","team":"Nashville Elite Giants","values":{"ops_plus":1,"era_plus":82},"rowScope":"team"},{"season":1934,"seasonType":"REG","team":"Cole's American Giants","values":{"ops_plus":78,"era_plus":53},"rowScope":"team"}],"careerTotals":{"REG":{"ops_plus":45,"era_plus":80}},"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":"2026-07-03T07:19:43.364Z"}