{"sport":"mlb","slug":"duff-brumley","bio":{"fullName":"Duff Brumley","position":"P","team":"TEX","heightInches":76,"weightLbs":195,"birthDate":"1970-08-25","rookieSeason":1994,"lastSeason":1994,"status":"RET","externalIds":{"mlbam":"111625","chadwick":"16a44060","retro":"brumd001","wikidata":"Q5312317"}},"draft":{"year":1990,"round":null,"pick":null,"team":null,"undrafted":false},"statTables":[{"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":1994,"seasonType":"REG","team":"TEX","gamesPlayed":2,"values":{"g":2,"gs":0,"w":0,"l":0,"sv":0,"ip":3.1,"so":4,"bb":5,"h":6,"er":6,"hr":1,"era":16.2,"whip":3.3},"rowScope":"team"}],"careerTotals":{"REG":{"g":2,"gs":0,"w":0,"l":0,"sv":0,"ip":3.1,"so":4,"bb":5,"h":6,"er":6,"hr":1,"era":16.2,"whip":3.3}}},{"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":1994,"seasonType":"REG","team":"TEX","values":{"ops_plus":null,"era_plus":30},"rowScope":"team"}],"careerTotals":{"REG":{"ops_plus":null,"era_plus":30}},"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":"2026-07-03T02:37:06.742Z"}