{"sport":"mlb","slug":"chris-booker","bio":{"fullName":"Chris Booker","position":"P","team":"WSH","heightInches":75,"weightLbs":235,"birthDate":"1976-12-09","rookieSeason":2005,"lastSeason":2007,"status":"RET","externalIds":{"mlbam":"407094","chadwick":"d79d2830","retro":"bookc001","wikidata":"Q5105932"}},"draft":{"year":1995,"round":null,"pick":null,"team":null,"undrafted":false},"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":2005,"seasonType":"REG","team":"CIN","gamesPlayed":3,"values":{"g":3,"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":2006,"seasonType":"REG","team":"WSH","gamesPlayed":10,"values":{"g":10,"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":2007,"seasonType":"REG","team":"WSH","gamesPlayed":3,"values":{"g":3,"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":16,"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}}},{"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":2005,"seasonType":"REG","team":"CIN","gamesPlayed":3,"values":{"g":3,"gs":0,"w":0,"l":0,"sv":0,"ip":2,"so":2,"bb":4,"h":6,"er":7,"hr":2,"era":31.5,"whip":5},"rowScope":"team"},{"season":2006,"seasonType":"REG","gamesPlayed":11,"gamesStarted":null,"values":{"g":11,"gs":0,"w":0,"l":0,"sv":0,"so":7,"bb":4,"h":10,"er":9,"hr":4,"ip":8.1,"era":9.72,"whip":1.68},"team":"TOT","rowScope":"total"},{"season":2006,"seasonType":"REG","team":"KC","gamesPlayed":1,"values":{"g":1,"gs":0,"w":0,"l":0,"sv":0,"ip":1,"so":0,"bb":3,"h":5,"er":6,"hr":3,"era":54,"whip":8},"rowScope":"team"},{"season":2006,"seasonType":"REG","team":"WSH","gamesPlayed":10,"values":{"g":10,"gs":0,"w":0,"l":0,"sv":0,"ip":7.1,"so":7,"bb":1,"h":5,"er":3,"hr":1,"era":3.68,"whip":0.82},"rowScope":"team"},{"season":2007,"seasonType":"REG","team":"WSH","gamesPlayed":3,"values":{"g":3,"gs":0,"w":0,"l":1,"sv":0,"ip":1,"so":1,"bb":1,"h":1,"er":2,"hr":1,"era":18,"whip":2},"rowScope":"team"}],"careerTotals":{"REG":{"g":17,"gs":0,"w":0,"l":1,"sv":0,"ip":11.1,"so":10,"bb":9,"h":17,"er":18,"hr":7,"era":14.29,"whip":2.29}}},{"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":2005,"seasonType":"REG","team":"CIN","values":{"ops_plus":null,"era_plus":14},"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":"KC","values":{"ops_plus":null,"era_plus":8},"rowScope":"team"},{"season":2006,"seasonType":"REG","team":"WSH","values":{"ops_plus":null,"era_plus":123},"rowScope":"team"},{"season":2007,"seasonType":"REG","team":"WSH","values":{"ops_plus":null,"era_plus":25},"rowScope":"team"}],"careerTotals":{"REG":{"ops_plus":null,"era_plus":31}},"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":"2026-07-03T02:16:20.189Z"}