{"sport":"mlb","slug":"ossie-alvarez","bio":{"fullName":"Ossie Alvarez","position":"SS","team":"DET","heightInches":70,"weightLbs":165,"birthDate":"1933-10-19","rookieSeason":1958,"lastSeason":1959,"status":"RET","externalIds":{"mlbam":"110207","chadwick":"2a3ecc0d","retro":"alvao101","wikidata":"Q7107497"}},"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":1958,"seasonType":"REG","team":"MIN","gamesPlayed":88,"values":{"g":88,"ab":196,"r":20,"h":41,"doubles":3,"triples":0,"hr":0,"rbi":5,"sb":1,"bb":16,"so":26,"avg":0.209,"obp":0.269,"slg":0.224,"ops":0.493},"rowScope":"team"},{"season":1959,"seasonType":"REG","team":"DET","gamesPlayed":8,"values":{"g":8,"ab":2,"r":0,"h":1,"doubles":0,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":0,"so":1,"avg":0.5,"obp":0.5,"slg":0.5,"ops":1},"rowScope":"team"}],"careerTotals":{"REG":{"g":96,"ab":198,"r":20,"h":42,"doubles":3,"triples":0,"hr":0,"rbi":5,"sb":1,"bb":16,"so":27,"avg":0.212,"obp":0.271,"slg":0.227,"ops":0.498}}},{"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":1958,"seasonType":"REG","team":"MIN","values":{"ops_plus":42,"era_plus":null},"rowScope":"team"},{"season":1959,"seasonType":"REG","team":"DET","values":{"ops_plus":188,"era_plus":null},"rowScope":"team"}],"careerTotals":{"REG":{"ops_plus":44,"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":"2026-07-03T03:10:36.276Z"}