{"sport":"mlb","slug":"brent-butler","bio":{"fullName":"Brent Butler","position":"2B","team":"COL","heightInches":72,"weightLbs":180,"birthDate":"1978-02-11","rookieSeason":2001,"lastSeason":2003,"status":"RET","externalIds":{"mlbam":"150450","chadwick":"9b6064d0","retro":"butlb002","wikidata":"Q4961330"}},"draft":{"year":1996,"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":2001,"seasonType":"REG","team":"COL","gamesPlayed":53,"values":{"g":53,"ab":119,"r":17,"h":29,"doubles":7,"triples":1,"hr":1,"rbi":14,"sb":1,"bb":7,"so":7,"avg":0.244,"obp":0.287,"slg":0.345,"ops":0.632},"rowScope":"team"},{"season":2002,"seasonType":"REG","team":"COL","gamesPlayed":113,"values":{"g":113,"ab":344,"r":55,"h":89,"doubles":18,"triples":4,"hr":9,"rbi":42,"sb":2,"bb":10,"so":40,"avg":0.259,"obp":0.287,"slg":0.413,"ops":0.7},"rowScope":"team"},{"season":2003,"seasonType":"REG","team":"COL","gamesPlayed":37,"values":{"g":37,"ab":90,"r":13,"h":19,"doubles":3,"triples":1,"hr":1,"rbi":4,"sb":1,"bb":7,"so":13,"avg":0.211,"obp":0.276,"slg":0.3,"ops":0.576},"rowScope":"team"}],"careerTotals":{"REG":{"g":203,"ab":553,"r":85,"h":137,"doubles":28,"triples":6,"hr":11,"rbi":60,"sb":4,"bb":24,"so":60,"avg":0.248,"obp":0.285,"slg":0.38,"ops":0.665}}},{"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":2001,"seasonType":"REG","team":"COL","values":{"ops_plus":69,"era_plus":null},"rowScope":"team"},{"season":2002,"seasonType":"REG","team":"COL","values":{"ops_plus":86,"era_plus":null},"rowScope":"team"},{"season":2003,"seasonType":"REG","team":"COL","values":{"ops_plus":55,"era_plus":null},"rowScope":"team"}],"careerTotals":{"REG":{"ops_plus":77,"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":"2026-07-03T02:16:20.189Z"}