{"sport":"mlb","slug":"stack-martin","bio":{"fullName":"Stack Martin","position":"X","team":null,"heightInches":73,"weightLbs":182,"birthDate":"1899-02-12","rookieSeason":1925,"lastSeason":1928,"status":"RET","externalIds":{"mlbam":"818333","chadwick":"f5ce9fd0","retro":"marts104"}},"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":1925,"seasonType":"REG","team":"Indianapolis ABC's","gamesPlayed":56,"values":{"g":56,"ab":200,"r":30,"h":56,"doubles":9,"triples":5,"hr":5,"rbi":36,"sb":6,"bb":6,"so":null,"avg":0.28,"obp":0.304,"slg":0.45,"ops":0.754},"rowScope":"team"},{"season":1926,"seasonType":"REG","team":"Indianapolis ABC's","gamesPlayed":77,"values":{"g":77,"ab":294,"r":51,"h":104,"doubles":22,"triples":7,"hr":4,"rbi":65,"sb":11,"bb":11,"so":null,"avg":0.354,"obp":0.383,"slg":0.517,"ops":0.9},"rowScope":"team"},{"season":1927,"seasonType":"REG","team":"Detroit Stars","gamesPlayed":57,"values":{"g":57,"ab":206,"r":30,"h":52,"doubles":9,"triples":4,"hr":8,"rbi":39,"sb":6,"bb":10,"so":null,"avg":0.252,"obp":0.287,"slg":0.451,"ops":0.738},"rowScope":"team"},{"season":1928,"seasonType":"REG","team":"Detroit Stars","gamesPlayed":51,"values":{"g":51,"ab":171,"r":24,"h":53,"doubles":10,"triples":3,"hr":1,"rbi":30,"sb":2,"bb":5,"so":null,"avg":0.31,"obp":0.33,"slg":0.421,"ops":0.751},"rowScope":"team"}],"careerTotals":{"REG":{"g":241,"ab":871,"r":135,"h":265,"doubles":50,"triples":19,"hr":18,"rbi":170,"sb":25,"bb":32,"so":null,"avg":0.304,"obp":0.332,"slg":0.467,"ops":0.799}}},{"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":1925,"seasonType":"REG","team":"Indianapolis ABC's","gamesPlayed":5,"values":{"g":5,"gs":5,"w":0,"l":5,"sv":0,"ip":33.1,"so":13,"bb":19,"h":39,"er":27,"hr":6,"era":7.29,"whip":1.74},"rowScope":"team"},{"season":1926,"seasonType":"REG","team":"Indianapolis ABC's","gamesPlayed":1,"values":{"g":1,"gs":1,"w":0,"l":1,"sv":0,"ip":8,"so":2,"bb":5,"h":9,"er":4,"hr":0,"era":4.5,"whip":1.75},"rowScope":"team"},{"season":1928,"seasonType":"REG","team":"Detroit Stars","gamesPlayed":1,"values":{"g":1,"gs":0,"w":0,"l":1,"sv":0,"ip":7,"so":2,"bb":4,"h":6,"er":4,"hr":1,"era":5.14,"whip":1.43},"rowScope":"team"}],"careerTotals":{"REG":{"g":7,"gs":6,"w":0,"l":7,"sv":0,"ip":48.1,"so":17,"bb":28,"h":54,"er":35,"hr":7,"era":6.52,"whip":1.7}}},{"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":1925,"seasonType":"REG","team":"Indianapolis ABC's","values":{"ops_plus":112,"era_plus":62},"rowScope":"team"},{"season":1926,"seasonType":"REG","team":"Indianapolis ABC's","values":{"ops_plus":138,"era_plus":84},"rowScope":"team"},{"season":1927,"seasonType":"REG","team":"Detroit Stars","values":{"ops_plus":106,"era_plus":null},"rowScope":"team"},{"season":1928,"seasonType":"REG","team":"Detroit Stars","values":{"ops_plus":117,"era_plus":76},"rowScope":"team"}],"careerTotals":{"REG":{"ops_plus":121,"era_plus":67}},"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":"2026-07-03T07:30:05.395Z"}