{"sport":"mlb","slug":"rogelio-alonso","bio":{"fullName":"Rogelio Alonso","position":"X","team":null,"heightInches":66,"weightLbs":null,"birthDate":null,"rookieSeason":1927,"lastSeason":1930,"status":"RET","externalIds":{"mlbam":"820722","chadwick":"95d6d59c","retro":"alonr101","wikidata":"Q104473367"}},"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":1927,"seasonType":"REG","team":"Cuban Stars West","gamesPlayed":56,"values":{"g":56,"ab":170,"r":17,"h":36,"doubles":8,"triples":2,"hr":0,"rbi":12,"sb":2,"bb":14,"so":null,"avg":0.212,"obp":0.272,"slg":0.282,"ops":0.554},"rowScope":"team"},{"season":1928,"seasonType":"REG","team":"Cuban Stars West","gamesPlayed":44,"values":{"g":44,"ab":135,"r":10,"h":26,"doubles":7,"triples":0,"hr":0,"rbi":11,"sb":2,"bb":6,"so":null,"avg":0.193,"obp":0.238,"slg":0.244,"ops":0.482},"rowScope":"team"},{"season":1929,"seasonType":"REG","team":"Cuban Stars West","gamesPlayed":44,"values":{"g":44,"ab":162,"r":21,"h":43,"doubles":4,"triples":2,"hr":1,"rbi":16,"sb":8,"bb":10,"so":null,"avg":0.265,"obp":0.316,"slg":0.333,"ops":0.649},"rowScope":"team"},{"season":1930,"seasonType":"REG","team":"Cuban Stars West","gamesPlayed":45,"values":{"g":45,"ab":178,"r":26,"h":52,"doubles":6,"triples":4,"hr":0,"rbi":14,"sb":8,"bb":15,"so":null,"avg":0.292,"obp":0.354,"slg":0.371,"ops":0.725},"rowScope":"team"}],"careerTotals":{"REG":{"g":189,"ab":645,"r":74,"h":157,"doubles":25,"triples":8,"hr":1,"rbi":53,"sb":20,"bb":45,"so":null,"avg":0.243,"obp":0.299,"slg":0.312,"ops":0.611}}},{"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":1927,"seasonType":"REG","team":"Cuban Stars West","gamesPlayed":8,"values":{"g":8,"gs":7,"w":1,"l":5,"sv":0,"ip":53,"so":23,"bb":17,"h":54,"er":30,"hr":3,"era":5.09,"whip":1.34},"rowScope":"team"},{"season":1928,"seasonType":"REG","team":"Cuban Stars West","gamesPlayed":8,"values":{"g":8,"gs":6,"w":1,"l":3,"sv":0,"ip":29.2,"so":12,"bb":18,"h":52,"er":33,"hr":6,"era":10.01,"whip":2.36},"rowScope":"team"},{"season":1929,"seasonType":"REG","team":"Cuban Stars West","gamesPlayed":2,"values":{"g":2,"gs":0,"w":0,"l":0,"sv":0,"ip":7.1,"so":4,"bb":5,"h":6,"er":5,"hr":0,"era":6.14,"whip":1.5},"rowScope":"team"},{"season":1930,"seasonType":"REG","team":"Cuban Stars West","gamesPlayed":2,"values":{"g":2,"gs":1,"w":0,"l":1,"sv":0,"ip":16,"so":4,"bb":2,"h":22,"er":7,"hr":1,"era":3.94,"whip":1.5},"rowScope":"team"}],"careerTotals":{"REG":{"g":20,"gs":14,"w":2,"l":9,"sv":0,"ip":106,"so":43,"bb":42,"h":134,"er":75,"hr":10,"era":6.37,"whip":1.66}}},{"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":1927,"seasonType":"REG","team":"Cuban Stars West","values":{"ops_plus":52,"era_plus":88},"rowScope":"team"},{"season":1928,"seasonType":"REG","team":"Cuban Stars West","values":{"ops_plus":29,"era_plus":48},"rowScope":"team"},{"season":1929,"seasonType":"REG","team":"Cuban Stars West","values":{"ops_plus":67,"era_plus":68},"rowScope":"team"},{"season":1930,"seasonType":"REG","team":"Cuban Stars West","values":{"ops_plus":81,"era_plus":115},"rowScope":"team"}],"careerTotals":{"REG":{"ops_plus":60,"era_plus":72}},"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":"2026-07-03T07:19:43.364Z"}