{"sport":"mlb","slug":"al-halt","bio":{"fullName":"Al Halt","position":"3B","team":"CLE","heightInches":72,"weightLbs":180,"birthDate":"1890-11-23","rookieSeason":1914,"lastSeason":1918,"status":"RET","externalIds":{"mlbam":"115369","chadwick":"9d28969d","retro":"halta101","wikidata":"Q4703961"}},"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":1914,"seasonType":"REG","team":"Brooklyn Feds","gamesPlayed":80,"values":{"g":80,"ab":261,"r":26,"h":61,"doubles":6,"triples":2,"hr":3,"rbi":25,"sb":11,"bb":13,"so":39,"avg":0.234,"obp":0.27,"slg":0.307,"ops":0.577},"rowScope":"team"},{"season":1915,"seasonType":"REG","team":"Brooklyn Feds","gamesPlayed":151,"values":{"g":151,"ab":524,"r":41,"h":131,"doubles":22,"triples":7,"hr":3,"rbi":64,"sb":20,"bb":39,"so":79,"avg":0.25,"obp":0.307,"slg":0.336,"ops":0.643},"rowScope":"team"},{"season":1918,"seasonType":"REG","team":"CLE","gamesPlayed":26,"values":{"g":26,"ab":69,"r":9,"h":12,"doubles":2,"triples":0,"hr":0,"rbi":1,"sb":4,"bb":9,"so":12,"avg":0.174,"obp":0.269,"slg":0.203,"ops":0.472},"rowScope":"team"}],"careerTotals":{"REG":{"g":257,"ab":854,"r":76,"h":204,"doubles":30,"triples":9,"hr":6,"rbi":90,"sb":35,"bb":61,"so":130,"avg":0.239,"obp":0.293,"slg":0.316,"ops":0.609}}},{"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":1914,"seasonType":"REG","team":"Brooklyn Feds","values":{"ops_plus":70,"era_plus":null},"rowScope":"team"},{"season":1915,"seasonType":"REG","team":"Brooklyn Feds","values":{"ops_plus":94,"era_plus":null},"rowScope":"team"},{"season":1918,"seasonType":"REG","team":"CLE","values":{"ops_plus":47,"era_plus":null},"rowScope":"team"}],"careerTotals":{"REG":{"ops_plus":83,"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":"2026-07-03T07:40:28.886Z"}