{"sport":"mlb","slug":"keith-hernandez","bio":{"fullName":"Keith Hernandez","position":"1B","team":"CLE","heightInches":72,"weightLbs":195,"birthDate":"1953-10-20","rookieSeason":1974,"lastSeason":1990,"status":"RET","externalIds":{"mlbam":"115826","chadwick":"ea0bdc1d","retro":"hernk001","wikidata":"Q3194742"}},"draft":{"year":1971,"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":1974,"seasonType":"REG","team":"STL","gamesPlayed":14,"values":{"g":14,"ab":34,"r":3,"h":10,"doubles":1,"triples":2,"hr":0,"rbi":2,"sb":0,"bb":7,"so":8,"avg":0.294,"obp":0.415,"slg":0.441,"ops":0.856},"rowScope":"team"},{"season":1975,"seasonType":"REG","team":"STL","gamesPlayed":64,"values":{"g":64,"ab":188,"r":20,"h":47,"doubles":8,"triples":2,"hr":3,"rbi":20,"sb":0,"bb":17,"so":26,"avg":0.25,"obp":0.309,"slg":0.362,"ops":0.671},"rowScope":"team"},{"season":1976,"seasonType":"REG","team":"STL","gamesPlayed":129,"values":{"g":129,"ab":374,"r":54,"h":108,"doubles":21,"triples":5,"hr":7,"rbi":46,"sb":4,"bb":49,"so":53,"avg":0.289,"obp":0.376,"slg":0.428,"ops":0.804},"rowScope":"team"},{"season":1977,"seasonType":"REG","team":"STL","gamesPlayed":161,"values":{"g":161,"ab":560,"r":90,"h":163,"doubles":41,"triples":4,"hr":15,"rbi":91,"sb":7,"bb":79,"so":88,"avg":0.291,"obp":0.379,"slg":0.459,"ops":0.838},"rowScope":"team"},{"season":1978,"seasonType":"REG","team":"STL","gamesPlayed":159,"values":{"g":159,"ab":542,"r":90,"h":138,"doubles":32,"triples":4,"hr":11,"rbi":64,"sb":13,"bb":82,"so":68,"avg":0.255,"obp":0.351,"slg":0.389,"ops":0.74},"rowScope":"team"},{"season":1979,"seasonType":"REG","team":"STL","gamesPlayed":161,"values":{"g":161,"ab":610,"r":116,"h":210,"doubles":48,"triples":11,"hr":11,"rbi":105,"sb":11,"bb":80,"so":78,"avg":0.344,"obp":0.417,"slg":0.513,"ops":0.93},"rowScope":"team"},{"season":1980,"seasonType":"REG","team":"STL","gamesPlayed":159,"values":{"g":159,"ab":595,"r":111,"h":191,"doubles":39,"triples":8,"hr":16,"rbi":99,"sb":14,"bb":86,"so":73,"avg":0.321,"obp":0.408,"slg":0.494,"ops":0.902},"rowScope":"team"},{"season":1981,"seasonType":"REG","team":"STL","gamesPlayed":103,"values":{"g":103,"ab":376,"r":65,"h":115,"doubles":27,"triples":4,"hr":8,"rbi":48,"sb":12,"bb":61,"so":45,"avg":0.306,"obp":0.401,"slg":0.463,"ops":0.864},"rowScope":"team"},{"season":1982,"seasonType":"REG","team":"STL","gamesPlayed":160,"values":{"g":160,"ab":579,"r":79,"h":173,"doubles":33,"triples":6,"hr":7,"rbi":94,"sb":19,"bb":100,"so":67,"avg":0.299,"obp":0.397,"slg":0.413,"ops":0.81},"rowScope":"team"},{"season":1982,"seasonType":"POST","team":"STL","gamesPlayed":10,"values":{"g":10,"ab":39,"r":7,"h":11,"doubles":2,"triples":0,"hr":1,"rbi":9,"sb":0,"bb":6,"so":5,"avg":0.282,"obp":0.378,"slg":0.41,"ops":0.788},"rowScope":"team"},{"season":1983,"seasonType":"REG","gamesPlayed":150,"gamesStarted":null,"values":{"g":150,"ab":538,"r":77,"h":160,"doubles":23,"triples":7,"hr":12,"rbi":63,"sb":9,"bb":88,"so":72,"avg":0.297,"slg":0.433,"obp":null,"ops":null},"team":"TOT","rowScope":"total"},{"season":1983,"seasonType":"REG","team":"NYM","gamesPlayed":95,"values":{"g":95,"ab":320,"r":43,"h":98,"doubles":8,"triples":3,"hr":9,"rbi":37,"sb":8,"bb":64,"so":42,"avg":0.306,"obp":0.424,"slg":0.434,"ops":0.858},"rowScope":"team"},{"season":1983,"seasonType":"REG","team":"STL","gamesPlayed":55,"values":{"g":55,"ab":218,"r":34,"h":62,"doubles":15,"triples":4,"hr":3,"rbi":26,"sb":1,"bb":24,"so":30,"avg":0.284,"obp":0.352,"slg":0.431,"ops":0.783},"rowScope":"team"},{"season":1984,"seasonType":"REG","team":"NYM","gamesPlayed":154,"values":{"g":154,"ab":550,"r":83,"h":171,"doubles":31,"triples":0,"hr":15,"rbi":94,"sb":2,"bb":97,"so":89,"avg":0.311,"obp":0.409,"slg":0.449,"ops":0.858},"rowScope":"team"},{"season":1985,"seasonType":"REG","team":"NYM","gamesPlayed":158,"values":{"g":158,"ab":593,"r":87,"h":183,"doubles":34,"triples":4,"hr":10,"rbi":91,"sb":3,"bb":77,"so":59,"avg":0.309,"obp":0.384,"slg":0.43,"ops":0.814},"rowScope":"team"},{"season":1986,"seasonType":"REG","team":"NYM","gamesPlayed":149,"values":{"g":149,"ab":551,"r":94,"h":171,"doubles":34,"triples":1,"hr":13,"rbi":83,"sb":2,"bb":94,"so":69,"avg":0.31,"obp":0.413,"slg":0.446,"ops":0.859},"rowScope":"team"},{"season":1986,"seasonType":"POST","team":"NYM","gamesPlayed":13,"values":{"g":13,"ab":52,"r":4,"h":13,"doubles":1,"triples":1,"hr":0,"rbi":7,"sb":0,"bb":8,"so":7,"avg":0.25,"obp":0.344,"slg":0.308,"ops":0.652},"rowScope":"team"},{"season":1987,"seasonType":"REG","team":"NYM","gamesPlayed":154,"values":{"g":154,"ab":587,"r":87,"h":170,"doubles":28,"triples":2,"hr":18,"rbi":89,"sb":0,"bb":81,"so":104,"avg":0.29,"obp":0.377,"slg":0.436,"ops":0.813},"rowScope":"team"},{"season":1988,"seasonType":"REG","team":"NYM","gamesPlayed":95,"values":{"g":95,"ab":348,"r":43,"h":96,"doubles":16,"triples":0,"hr":11,"rbi":55,"sb":2,"bb":31,"so":57,"avg":0.276,"obp":0.333,"slg":0.417,"ops":0.75},"rowScope":"team"},{"season":1988,"seasonType":"POST","team":"NYM","gamesPlayed":7,"values":{"g":7,"ab":26,"r":2,"h":7,"doubles":0,"triples":0,"hr":1,"rbi":5,"sb":1,"bb":6,"so":7,"avg":0.269,"obp":0.406,"slg":0.385,"ops":0.791},"rowScope":"team"},{"season":1989,"seasonType":"REG","team":"NYM","gamesPlayed":75,"values":{"g":75,"ab":215,"r":18,"h":50,"doubles":8,"triples":0,"hr":4,"rbi":19,"sb":0,"bb":27,"so":39,"avg":0.233,"obp":0.324,"slg":0.326,"ops":0.65},"rowScope":"team"},{"season":1990,"seasonType":"REG","team":"CLE","gamesPlayed":43,"values":{"g":43,"ab":130,"r":7,"h":26,"doubles":2,"triples":0,"hr":1,"rbi":8,"sb":0,"bb":14,"so":17,"avg":0.2,"obp":0.283,"slg":0.238,"ops":0.521},"rowScope":"team"}],"careerTotals":{"REG":{"g":2088,"ab":7370,"r":1124,"h":2182,"doubles":426,"triples":60,"hr":162,"rbi":1071,"sb":98,"bb":1070,"so":1012,"avg":0.296,"obp":0.384,"slg":0.436,"ops":0.82},"POST":{"g":30,"ab":117,"r":13,"h":31,"doubles":3,"triples":1,"hr":2,"rbi":21,"sb":1,"bb":20,"so":19,"avg":0.265,"obp":0.37,"slg":0.359,"ops":0.729}}},{"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":1974,"seasonType":"REG","team":"STL","values":{"ops_plus":148,"era_plus":null},"rowScope":"team"},{"season":1975,"seasonType":"REG","team":"STL","values":{"ops_plus":92,"era_plus":null},"rowScope":"team"},{"season":1976,"seasonType":"REG","team":"STL","values":{"ops_plus":134,"era_plus":null},"rowScope":"team"},{"season":1977,"seasonType":"REG","team":"STL","values":{"ops_plus":131,"era_plus":null},"rowScope":"team"},{"season":1978,"seasonType":"REG","team":"STL","values":{"ops_plus":112,"era_plus":null},"rowScope":"team"},{"season":1979,"seasonType":"REG","team":"STL","values":{"ops_plus":158,"era_plus":null},"rowScope":"team"},{"season":1980,"seasonType":"REG","team":"STL","values":{"ops_plus":156,"era_plus":null},"rowScope":"team"},{"season":1981,"seasonType":"REG","team":"STL","values":{"ops_plus":151,"era_plus":null},"rowScope":"team"},{"season":1982,"seasonType":"REG","team":"STL","values":{"ops_plus":133,"era_plus":null},"rowScope":"team"},{"season":1983,"seasonType":"REG","gamesPlayed":null,"gamesStarted":null,"values":{"ops_plus":null,"era_plus":null},"team":"TOT","rowScope":"total"},{"season":1983,"seasonType":"REG","team":"NYM","values":{"ops_plus":146,"era_plus":null},"rowScope":"team"},{"season":1983,"seasonType":"REG","team":"STL","values":{"ops_plus":125,"era_plus":null},"rowScope":"team"},{"season":1984,"seasonType":"REG","team":"NYM","values":{"ops_plus":151,"era_plus":null},"rowScope":"team"},{"season":1985,"seasonType":"REG","team":"NYM","values":{"ops_plus":137,"era_plus":null},"rowScope":"team"},{"season":1986,"seasonType":"REG","team":"NYM","values":{"ops_plus":145,"era_plus":null},"rowScope":"team"},{"season":1987,"seasonType":"REG","team":"NYM","values":{"ops_plus":121,"era_plus":null},"rowScope":"team"},{"season":1988,"seasonType":"REG","team":"NYM","values":{"ops_plus":122,"era_plus":null},"rowScope":"team"},{"season":1989,"seasonType":"REG","team":"NYM","values":{"ops_plus":89,"era_plus":null},"rowScope":"team"},{"season":1990,"seasonType":"REG","team":"CLE","values":{"ops_plus":47,"era_plus":null},"rowScope":"team"}],"careerTotals":{"REG":{"ops_plus":134,"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":"2026-07-03T02:37:06.742Z"}