{"sport":"mlb","slug":"al-chambers","bio":{"fullName":"Al Chambers","position":"DH","team":"SEA","heightInches":76,"weightLbs":217,"birthDate":"1961-03-24","rookieSeason":1983,"lastSeason":1985,"status":"RET","externalIds":{"mlbam":"112175","chadwick":"415d4445","retro":"chama001","wikidata":"Q4703663"}},"draft":{"year":1979,"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":1983,"seasonType":"REG","team":"SEA","gamesPlayed":31,"values":{"g":31,"ab":67,"r":11,"h":14,"doubles":3,"triples":0,"hr":1,"rbi":7,"sb":0,"bb":18,"so":20,"avg":0.209,"obp":0.376,"slg":0.299,"ops":0.675},"rowScope":"team"},{"season":1984,"seasonType":"REG","team":"SEA","gamesPlayed":22,"values":{"g":22,"ab":49,"r":4,"h":11,"doubles":1,"triples":0,"hr":1,"rbi":4,"sb":2,"bb":3,"so":12,"avg":0.224,"obp":0.269,"slg":0.306,"ops":0.575},"rowScope":"team"},{"season":1985,"seasonType":"REG","team":"SEA","gamesPlayed":4,"values":{"g":4,"ab":4,"r":0,"h":0,"doubles":0,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":0,"so":2,"avg":0,"obp":0,"slg":0,"ops":0},"rowScope":"team"}],"careerTotals":{"REG":{"g":57,"ab":120,"r":15,"h":25,"doubles":4,"triples":0,"hr":2,"rbi":11,"sb":2,"bb":21,"so":34,"avg":0.208,"obp":0.326,"slg":0.292,"ops":0.618}}},{"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":1983,"seasonType":"REG","team":"SEA","values":{"ops_plus":90,"era_plus":null},"rowScope":"team"},{"season":1984,"seasonType":"REG","team":"SEA","values":{"ops_plus":60,"era_plus":null},"rowScope":"team"},{"season":1985,"seasonType":"REG","team":"SEA","values":{"ops_plus":-100,"era_plus":null},"rowScope":"team"}],"careerTotals":{"REG":{"ops_plus":71,"era_plus":null}},"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"}