{"sport":"mlb","slug":"oliver-perez","bio":{"fullName":"Oliver Pérez","position":"P","team":"AZ","heightInches":75,"weightLbs":225,"birthDate":"1981-08-15","rookieSeason":2002,"lastSeason":2022,"status":"RET","externalIds":{"mlbam":"424144","chadwick":"2d528d35","retro":"pereo002","wikidata":"Q848275"}},"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":2002,"seasonType":"REG","team":"SD","gamesPlayed":16,"values":{"g":16,"ab":30,"r":1,"h":4,"doubles":0,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":0,"so":11,"avg":0.133,"obp":0.133,"slg":0.133,"ops":0.266},"rowScope":"team"},{"season":2003,"seasonType":"REG","gamesPlayed":24,"gamesStarted":null,"values":{"g":24,"ab":39,"r":0,"h":7,"doubles":0,"triples":0,"hr":0,"rbi":4,"sb":0,"bb":1,"so":11,"avg":0.179,"slg":0.179,"obp":null,"ops":null},"team":"TOT","rowScope":"total"},{"season":2003,"seasonType":"REG","team":"PIT","gamesPlayed":5,"values":{"g":5,"ab":6,"r":0,"h":0,"doubles":0,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":0,"so":1,"avg":0,"obp":0,"slg":0,"ops":0},"rowScope":"team"},{"season":2003,"seasonType":"REG","team":"SD","gamesPlayed":19,"values":{"g":19,"ab":33,"r":0,"h":7,"doubles":0,"triples":0,"hr":0,"rbi":4,"sb":0,"bb":1,"so":10,"avg":0.212,"obp":0.229,"slg":0.212,"ops":0.441},"rowScope":"team"},{"season":2004,"seasonType":"REG","team":"PIT","gamesPlayed":31,"values":{"g":31,"ab":58,"r":2,"h":11,"doubles":0,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":4,"so":22,"avg":0.19,"obp":0.242,"slg":0.19,"ops":0.432},"rowScope":"team"},{"season":2005,"seasonType":"REG","team":"PIT","gamesPlayed":20,"values":{"g":20,"ab":33,"r":1,"h":6,"doubles":0,"triples":0,"hr":0,"rbi":3,"sb":1,"bb":1,"so":11,"avg":0.182,"obp":0.2,"slg":0.182,"ops":0.382},"rowScope":"team"},{"season":2006,"seasonType":"REG","gamesPlayed":23,"gamesStarted":null,"values":{"g":23,"ab":38,"r":0,"h":4,"doubles":0,"triples":0,"hr":0,"rbi":3,"sb":1,"bb":2,"so":12,"avg":0.105,"slg":0.105,"obp":null,"ops":null},"team":"TOT","rowScope":"total"},{"season":2006,"seasonType":"REG","team":"NYM","gamesPlayed":7,"values":{"g":7,"ab":13,"r":0,"h":1,"doubles":0,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":2,"so":4,"avg":0.077,"obp":0.2,"slg":0.077,"ops":0.277},"rowScope":"team"},{"season":2006,"seasonType":"REG","team":"PIT","gamesPlayed":16,"values":{"g":16,"ab":25,"r":0,"h":3,"doubles":0,"triples":0,"hr":0,"rbi":3,"sb":1,"bb":0,"so":8,"avg":0.12,"obp":0.12,"slg":0.12,"ops":0.24},"rowScope":"team"},{"season":2006,"seasonType":"POST","team":"NYM","gamesPlayed":2,"values":{"g":2,"ab":5,"r":0,"h":0,"doubles":0,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":1,"so":3,"avg":0,"obp":0.167,"slg":0,"ops":0.167},"rowScope":"team"},{"season":2007,"seasonType":"REG","team":"NYM","gamesPlayed":29,"values":{"g":29,"ab":56,"r":6,"h":9,"doubles":0,"triples":0,"hr":0,"rbi":1,"sb":0,"bb":0,"so":15,"avg":0.161,"obp":0.161,"slg":0.161,"ops":0.322},"rowScope":"team"},{"season":2008,"seasonType":"REG","team":"NYM","gamesPlayed":34,"values":{"g":34,"ab":56,"r":2,"h":6,"doubles":1,"triples":0,"hr":0,"rbi":3,"sb":1,"bb":4,"so":23,"avg":0.107,"obp":0.167,"slg":0.125,"ops":0.292},"rowScope":"team"},{"season":2009,"seasonType":"REG","team":"NYM","gamesPlayed":14,"values":{"g":14,"ab":22,"r":1,"h":6,"doubles":0,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":1,"so":7,"avg":0.273,"obp":0.304,"slg":0.273,"ops":0.577},"rowScope":"team"},{"season":2010,"seasonType":"REG","team":"NYM","gamesPlayed":17,"values":{"g":17,"ab":9,"r":0,"h":1,"doubles":0,"triples":0,"hr":0,"rbi":1,"sb":0,"bb":1,"so":4,"avg":0.111,"obp":0.2,"slg":0.111,"ops":0.311},"rowScope":"team"},{"season":2012,"seasonType":"REG","team":"SEA","gamesPlayed":33,"values":{"g":33,"ab":0,"r":0,"h":0,"doubles":0,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":0,"so":0,"avg":0,"obp":0,"slg":0,"ops":0},"rowScope":"team"},{"season":2013,"seasonType":"REG","team":"SEA","gamesPlayed":61,"values":{"g":61,"ab":0,"r":0,"h":0,"doubles":0,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":0,"so":0,"avg":0,"obp":0,"slg":0,"ops":0},"rowScope":"team"},{"season":2014,"seasonType":"REG","team":"AZ","gamesPlayed":68,"values":{"g":68,"ab":0,"r":0,"h":0,"doubles":0,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":0,"so":0,"avg":0,"obp":0,"slg":0,"ops":0},"rowScope":"team"},{"season":2015,"seasonType":"REG","gamesPlayed":70,"gamesStarted":null,"values":{"g":70,"ab":0,"r":0,"h":0,"doubles":0,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":0,"so":0,"avg":null,"slg":null,"obp":null,"ops":null},"team":"TOT","rowScope":"total"},{"season":2015,"seasonType":"REG","team":"AZ","gamesPlayed":48,"values":{"g":48,"ab":0,"r":0,"h":0,"doubles":0,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":0,"so":0,"avg":0,"obp":0,"slg":0,"ops":0},"rowScope":"team"},{"season":2015,"seasonType":"REG","team":"HOU","gamesPlayed":22,"values":{"g":22,"ab":0,"r":0,"h":0,"doubles":0,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":0,"so":0,"avg":0,"obp":0,"slg":0,"ops":0},"rowScope":"team"},{"season":2016,"seasonType":"REG","team":"WSH","gamesPlayed":64,"values":{"g":64,"ab":3,"r":1,"h":2,"doubles":1,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":0,"so":0,"avg":0.667,"obp":0.667,"slg":1,"ops":1.667},"rowScope":"team"},{"season":2016,"seasonType":"POST","team":"WSH","gamesPlayed":4,"values":{"g":4,"ab":0,"r":0,"h":0,"doubles":0,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":0,"so":0,"avg":0,"obp":0,"slg":0,"ops":0},"rowScope":"team"},{"season":2017,"seasonType":"REG","team":"WSH","gamesPlayed":50,"values":{"g":50,"ab":0,"r":0,"h":0,"doubles":0,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":0,"so":0,"avg":0,"obp":0,"slg":0,"ops":0},"rowScope":"team"},{"season":2017,"seasonType":"POST","team":"WSH","gamesPlayed":2,"values":{"g":2,"ab":0,"r":0,"h":0,"doubles":0,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":0,"so":0,"avg":0,"obp":0,"slg":0,"ops":0},"rowScope":"team"},{"season":2018,"seasonType":"REG","team":"CLE","gamesPlayed":51,"values":{"g":51,"ab":0,"r":0,"h":0,"doubles":0,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":0,"so":0,"avg":0,"obp":0,"slg":0,"ops":0},"rowScope":"team"},{"season":2019,"seasonType":"REG","team":"CLE","gamesPlayed":67,"values":{"g":67,"ab":0,"r":0,"h":0,"doubles":0,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":0,"so":0,"avg":0,"obp":0,"slg":0,"ops":0},"rowScope":"team"},{"season":2021,"seasonType":"REG","team":"CLE","gamesPlayed":5,"values":{"g":5,"ab":0,"r":0,"h":0,"doubles":0,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":0,"so":0,"avg":0,"obp":0,"slg":0,"ops":0},"rowScope":"team"}],"careerTotals":{"REG":{"g":705,"ab":344,"r":14,"h":56,"doubles":2,"triples":0,"hr":0,"rbi":15,"sb":3,"bb":14,"so":116,"avg":0.163,"obp":0.194,"slg":0.169,"ops":0.363},"POST":{"g":8,"ab":5,"r":0,"h":0,"doubles":0,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":1,"so":3,"avg":0,"obp":0.167,"slg":0,"ops":0.167}}},{"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":2002,"seasonType":"REG","team":"SD","gamesPlayed":16,"values":{"g":16,"gs":15,"w":4,"l":5,"sv":0,"ip":90,"so":94,"bb":48,"h":71,"er":35,"hr":13,"era":3.5,"whip":1.32},"rowScope":"team"},{"season":2003,"seasonType":"REG","gamesPlayed":24,"gamesStarted":null,"values":{"g":24,"gs":24,"w":4,"l":10,"sv":0,"so":141,"bb":77,"h":129,"er":77,"hr":22,"ip":126.2,"era":5.47,"whip":1.63},"team":"TOT","rowScope":"total"},{"season":2003,"seasonType":"REG","team":"PIT","gamesPlayed":5,"values":{"g":5,"gs":5,"w":0,"l":3,"sv":0,"ip":23,"so":24,"bb":12,"h":26,"er":15,"hr":2,"era":5.87,"whip":1.65},"rowScope":"team"},{"season":2003,"seasonType":"REG","team":"SD","gamesPlayed":19,"values":{"g":19,"gs":19,"w":4,"l":7,"sv":0,"ip":103.2,"so":117,"bb":65,"h":103,"er":62,"hr":20,"era":5.38,"whip":1.62},"rowScope":"team"},{"season":2004,"seasonType":"REG","team":"PIT","gamesPlayed":30,"values":{"g":30,"gs":30,"w":12,"l":10,"sv":0,"ip":196,"so":239,"bb":81,"h":145,"er":65,"hr":22,"era":2.98,"whip":1.15},"rowScope":"team"},{"season":2005,"seasonType":"REG","team":"PIT","gamesPlayed":20,"values":{"g":20,"gs":20,"w":7,"l":5,"sv":0,"ip":103,"so":97,"bb":70,"h":102,"er":67,"hr":23,"era":5.85,"whip":1.67},"rowScope":"team"},{"season":2006,"seasonType":"REG","gamesPlayed":22,"gamesStarted":null,"values":{"g":22,"gs":22,"w":3,"l":13,"sv":0,"so":102,"bb":68,"h":129,"er":82,"hr":20,"ip":112.2,"era":6.55,"whip":1.75},"team":"TOT","rowScope":"total"},{"season":2006,"seasonType":"REG","team":"NYM","gamesPlayed":7,"values":{"g":7,"gs":7,"w":1,"l":3,"sv":0,"ip":36.2,"so":41,"bb":17,"h":41,"er":26,"hr":7,"era":6.38,"whip":1.58},"rowScope":"team"},{"season":2006,"seasonType":"REG","team":"PIT","gamesPlayed":15,"values":{"g":15,"gs":15,"w":2,"l":10,"sv":0,"ip":76,"so":61,"bb":51,"h":88,"er":56,"hr":13,"era":6.63,"whip":1.83},"rowScope":"team"},{"season":2006,"seasonType":"POST","team":"NYM","gamesPlayed":2,"values":{"g":2,"gs":2,"w":1,"l":0,"sv":0,"ip":11.2,"so":7,"bb":3,"h":13,"er":6,"hr":3,"era":4.63,"whip":1.37},"rowScope":"team"},{"season":2007,"seasonType":"REG","team":"NYM","gamesPlayed":29,"values":{"g":29,"gs":29,"w":15,"l":10,"sv":0,"ip":177,"so":174,"bb":79,"h":153,"er":70,"hr":22,"era":3.56,"whip":1.31},"rowScope":"team"},{"season":2008,"seasonType":"REG","team":"NYM","gamesPlayed":34,"values":{"g":34,"gs":34,"w":10,"l":7,"sv":0,"ip":194,"so":180,"bb":105,"h":167,"er":91,"hr":24,"era":4.22,"whip":1.4},"rowScope":"team"},{"season":2009,"seasonType":"REG","team":"NYM","gamesPlayed":14,"values":{"g":14,"gs":14,"w":3,"l":4,"sv":0,"ip":66,"so":62,"bb":58,"h":69,"er":50,"hr":12,"era":6.82,"whip":1.92},"rowScope":"team"},{"season":2010,"seasonType":"REG","team":"NYM","gamesPlayed":17,"values":{"g":17,"gs":7,"w":0,"l":5,"sv":0,"ip":46.1,"so":37,"bb":42,"h":54,"er":35,"hr":9,"era":6.8,"whip":2.07},"rowScope":"team"},{"season":2012,"seasonType":"REG","team":"SEA","gamesPlayed":33,"values":{"g":33,"gs":0,"w":1,"l":3,"sv":0,"ip":29.2,"so":24,"bb":10,"h":27,"er":7,"hr":1,"era":2.12,"whip":1.25},"rowScope":"team"},{"season":2013,"seasonType":"REG","team":"SEA","gamesPlayed":61,"values":{"g":61,"gs":0,"w":3,"l":3,"sv":2,"ip":53,"so":74,"bb":26,"h":50,"er":22,"hr":6,"era":3.74,"whip":1.43},"rowScope":"team"},{"season":2014,"seasonType":"REG","team":"AZ","gamesPlayed":68,"values":{"g":68,"gs":0,"w":3,"l":4,"sv":0,"ip":58.2,"so":76,"bb":24,"h":50,"er":19,"hr":5,"era":2.91,"whip":1.26},"rowScope":"team"},{"season":2015,"seasonType":"REG","gamesPlayed":70,"gamesStarted":null,"values":{"g":70,"gs":0,"w":2,"l":4,"sv":0,"so":51,"bb":15,"h":39,"er":19,"hr":4,"ip":41,"era":4.17,"whip":1.32},"team":"TOT","rowScope":"total"},{"season":2015,"seasonType":"REG","team":"AZ","gamesPlayed":48,"values":{"g":48,"gs":0,"w":2,"l":1,"sv":0,"ip":29,"so":37,"bb":11,"h":25,"er":10,"hr":2,"era":3.1,"whip":1.24},"rowScope":"team"},{"season":2015,"seasonType":"REG","team":"HOU","gamesPlayed":22,"values":{"g":22,"gs":0,"w":0,"l":3,"sv":0,"ip":12,"so":14,"bb":4,"h":14,"er":9,"hr":2,"era":6.75,"whip":1.5},"rowScope":"team"},{"season":2015,"seasonType":"POST","team":"HOU","gamesPlayed":2,"values":{"g":2,"gs":0,"w":0,"l":0,"sv":0,"ip":0.1,"so":0,"bb":1,"h":2,"er":1,"hr":0,"era":27,"whip":9},"rowScope":"team"},{"season":2016,"seasonType":"REG","team":"WSH","gamesPlayed":64,"values":{"g":64,"gs":0,"w":2,"l":3,"sv":0,"ip":40,"so":46,"bb":20,"h":38,"er":22,"hr":4,"era":4.95,"whip":1.45},"rowScope":"team"},{"season":2016,"seasonType":"POST","team":"WSH","gamesPlayed":4,"values":{"g":4,"gs":0,"w":0,"l":0,"sv":0,"ip":3.1,"so":3,"bb":1,"h":1,"er":0,"hr":0,"era":0,"whip":0.6},"rowScope":"team"},{"season":2017,"seasonType":"REG","team":"WSH","gamesPlayed":50,"values":{"g":50,"gs":0,"w":0,"l":0,"sv":1,"ip":33,"so":39,"bb":12,"h":32,"er":17,"hr":4,"era":4.64,"whip":1.33},"rowScope":"team"},{"season":2017,"seasonType":"POST","team":"WSH","gamesPlayed":2,"values":{"g":2,"gs":0,"w":1,"l":0,"sv":0,"ip":1,"so":0,"bb":0,"h":1,"er":0,"hr":0,"era":0,"whip":1},"rowScope":"team"},{"season":2018,"seasonType":"REG","team":"CLE","gamesPlayed":51,"values":{"g":51,"gs":0,"w":1,"l":1,"sv":0,"ip":32.1,"so":43,"bb":7,"h":17,"er":5,"hr":1,"era":1.39,"whip":0.74},"rowScope":"team"},{"season":2019,"seasonType":"REG","team":"CLE","gamesPlayed":67,"values":{"g":67,"gs":0,"w":2,"l":4,"sv":1,"ip":40.2,"so":48,"bb":12,"h":38,"er":18,"hr":5,"era":3.98,"whip":1.23},"rowScope":"team"},{"season":2020,"seasonType":"REG","team":"CLE","gamesPlayed":21,"values":{"g":21,"gs":0,"w":1,"l":1,"sv":1,"ip":18,"so":14,"bb":6,"h":13,"er":4,"hr":0,"era":2,"whip":1.06},"rowScope":"team"},{"season":2020,"seasonType":"POST","team":"CLE","gamesPlayed":1,"values":{"g":1,"gs":0,"w":0,"l":0,"sv":0,"ip":0.1,"so":0,"bb":0,"h":1,"er":0,"hr":0,"era":0,"whip":3},"rowScope":"team"},{"season":2021,"seasonType":"REG","team":"CLE","gamesPlayed":5,"values":{"g":5,"gs":0,"w":0,"l":1,"sv":0,"ip":3.2,"so":4,"bb":1,"h":5,"er":0,"hr":0,"era":0,"whip":1.64},"rowScope":"team"},{"season":2022,"seasonType":"REG","team":"AZ","gamesPlayed":7,"values":{"g":7,"gs":0,"w":1,"l":1,"sv":0,"ip":4,"so":1,"bb":1,"h":8,"er":7,"hr":1,"era":15.75,"whip":2.25},"rowScope":"team"}],"careerTotals":{"REG":{"g":703,"gs":195,"w":74,"l":94,"sv":5,"ip":1465.2,"so":1546,"bb":762,"h":1336,"er":712,"hr":198,"era":4.37,"whip":1.43},"POST":{"g":11,"gs":2,"w":2,"l":0,"sv":0,"ip":16.2,"so":10,"bb":5,"h":18,"er":7,"hr":3,"era":3.78,"whip":1.38}}},{"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":2002,"seasonType":"REG","team":"SD","values":{"ops_plus":-27,"era_plus":120},"rowScope":"team"},{"season":2003,"seasonType":"REG","gamesPlayed":null,"gamesStarted":null,"values":{"ops_plus":null,"era_plus":null},"team":"TOT","rowScope":"total"},{"season":2003,"seasonType":"REG","team":"PIT","values":{"ops_plus":-100,"era_plus":74},"rowScope":"team"},{"season":2003,"seasonType":"REG","team":"SD","values":{"ops_plus":24,"era_plus":80},"rowScope":"team"},{"season":2004,"seasonType":"REG","team":"PIT","values":{"ops_plus":19,"era_plus":147},"rowScope":"team"},{"season":2005,"seasonType":"REG","team":"PIT","values":{"ops_plus":7,"era_plus":73},"rowScope":"team"},{"season":2006,"seasonType":"REG","gamesPlayed":null,"gamesStarted":null,"values":{"ops_plus":null,"era_plus":null},"team":"TOT","rowScope":"total"},{"season":2006,"seasonType":"REG","team":"NYM","values":{"ops_plus":-21,"era_plus":71},"rowScope":"team"},{"season":2006,"seasonType":"REG","team":"PIT","values":{"ops_plus":-35,"era_plus":68},"rowScope":"team"},{"season":2007,"seasonType":"REG","team":"NYM","values":{"ops_plus":-13,"era_plus":125},"rowScope":"team"},{"season":2008,"seasonType":"REG","team":"NYM","values":{"ops_plus":-19,"era_plus":101},"rowScope":"team"},{"season":2009,"seasonType":"REG","team":"NYM","values":{"ops_plus":60,"era_plus":62},"rowScope":"team"},{"season":2010,"seasonType":"REG","team":"NYM","values":{"ops_plus":-10,"era_plus":60},"rowScope":"team"},{"season":2012,"seasonType":"REG","team":"SEA","values":{"ops_plus":null,"era_plus":194},"rowScope":"team"},{"season":2013,"seasonType":"REG","team":"SEA","values":{"ops_plus":null,"era_plus":108},"rowScope":"team"},{"season":2014,"seasonType":"REG","team":"AZ","values":{"ops_plus":null,"era_plus":127},"rowScope":"team"},{"season":2015,"seasonType":"REG","gamesPlayed":null,"gamesStarted":null,"values":{"ops_plus":null,"era_plus":null},"team":"TOT","rowScope":"total"},{"season":2015,"seasonType":"REG","team":"AZ","values":{"ops_plus":null,"era_plus":125},"rowScope":"team"},{"season":2015,"seasonType":"REG","team":"HOU","values":{"ops_plus":null,"era_plus":60},"rowScope":"team"},{"season":2016,"seasonType":"REG","team":"WSH","values":{"ops_plus":351,"era_plus":84},"rowScope":"team"},{"season":2017,"seasonType":"REG","team":"WSH","values":{"ops_plus":null,"era_plus":93},"rowScope":"team"},{"season":2018,"seasonType":"REG","team":"CLE","values":{"ops_plus":null,"era_plus":271},"rowScope":"team"},{"season":2019,"seasonType":"REG","team":"CLE","values":{"ops_plus":null,"era_plus":95},"rowScope":"team"},{"season":2022,"seasonType":"REG","team":"AZ","values":{"ops_plus":null,"era_plus":26},"rowScope":"team"}],"careerTotals":{"REG":{"ops_plus":0,"era_plus":96}},"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":"2026-07-03T01:45:00.516Z"}