{"sport":"mlb","slug":"grover-hartley","bio":{"fullName":"Grover Hartley","position":"C","team":"BAL","heightInches":71,"weightLbs":175,"birthDate":"1888-07-02","rookieSeason":1911,"lastSeason":1934,"status":"RET","externalIds":{"mlbam":"115565","chadwick":"ba3f05b5","retro":"hartg102"}},"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":1911,"seasonType":"REG","team":"SF","gamesPlayed":12,"values":{"g":12,"ab":18,"r":1,"h":4,"doubles":2,"triples":0,"hr":0,"rbi":1,"sb":1,"bb":1,"so":1,"avg":0.222,"obp":0.263,"slg":0.333,"ops":0.596},"rowScope":"team"},{"season":1912,"seasonType":"REG","team":"SF","gamesPlayed":25,"values":{"g":25,"ab":34,"r":3,"h":8,"doubles":2,"triples":1,"hr":0,"rbi":7,"sb":2,"bb":0,"so":4,"avg":0.235,"obp":0.257,"slg":0.353,"ops":0.61},"rowScope":"team"},{"season":1913,"seasonType":"REG","team":"SF","gamesPlayed":23,"values":{"g":23,"ab":19,"r":4,"h":6,"doubles":0,"triples":0,"hr":0,"rbi":0,"sb":4,"bb":1,"so":2,"avg":0.316,"obp":0.35,"slg":0.316,"ops":0.666},"rowScope":"team"},{"season":1914,"seasonType":"REG","team":"St. Louis Terriers","gamesPlayed":86,"values":{"g":86,"ab":212,"r":24,"h":61,"doubles":13,"triples":2,"hr":1,"rbi":25,"sb":4,"bb":12,"so":26,"avg":0.288,"obp":0.329,"slg":0.382,"ops":0.711},"rowScope":"team"},{"season":1915,"seasonType":"REG","team":"St. Louis Terriers","gamesPlayed":120,"values":{"g":120,"ab":394,"r":47,"h":108,"doubles":21,"triples":6,"hr":1,"rbi":50,"sb":10,"bb":42,"so":21,"avg":0.274,"obp":0.356,"slg":0.365,"ops":0.721},"rowScope":"team"},{"season":1916,"seasonType":"REG","team":"BAL","gamesPlayed":92,"values":{"g":92,"ab":222,"r":19,"h":50,"doubles":8,"triples":0,"hr":0,"rbi":12,"sb":4,"bb":30,"so":24,"avg":0.225,"obp":0.325,"slg":0.261,"ops":0.586},"rowScope":"team"},{"season":1917,"seasonType":"REG","team":"BAL","gamesPlayed":20,"values":{"g":20,"ab":13,"r":2,"h":3,"doubles":0,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":2,"so":1,"avg":0.231,"obp":0.333,"slg":0.231,"ops":0.564},"rowScope":"team"},{"season":1924,"seasonType":"REG","team":"SF","gamesPlayed":4,"values":{"g":4,"ab":7,"r":1,"h":2,"doubles":1,"triples":0,"hr":0,"rbi":1,"sb":1,"bb":1,"so":0,"avg":0.286,"obp":0.375,"slg":0.429,"ops":0.804},"rowScope":"team"},{"season":1925,"seasonType":"REG","team":"SF","gamesPlayed":46,"values":{"g":46,"ab":95,"r":9,"h":30,"doubles":1,"triples":1,"hr":0,"rbi":8,"sb":2,"bb":8,"so":3,"avg":0.316,"obp":0.375,"slg":0.347,"ops":0.722},"rowScope":"team"},{"season":1926,"seasonType":"REG","team":"SF","gamesPlayed":13,"values":{"g":13,"ab":21,"r":0,"h":1,"doubles":0,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":5,"so":0,"avg":0.048,"obp":0.231,"slg":0.048,"ops":0.279},"rowScope":"team"},{"season":1927,"seasonType":"REG","team":"BOS","gamesPlayed":103,"values":{"g":103,"ab":244,"r":23,"h":67,"doubles":11,"triples":0,"hr":1,"rbi":31,"sb":1,"bb":22,"so":14,"avg":0.275,"obp":0.337,"slg":0.332,"ops":0.669},"rowScope":"team"},{"season":1929,"seasonType":"REG","team":"CLE","gamesPlayed":24,"values":{"g":24,"ab":33,"r":2,"h":9,"doubles":0,"triples":1,"hr":0,"rbi":8,"sb":0,"bb":2,"so":1,"avg":0.273,"obp":0.314,"slg":0.333,"ops":0.647},"rowScope":"team"},{"season":1930,"seasonType":"REG","team":"CLE","gamesPlayed":1,"values":{"g":1,"ab":4,"r":0,"h":3,"doubles":0,"triples":0,"hr":0,"rbi":1,"sb":0,"bb":0,"so":0,"avg":0.75,"obp":0.75,"slg":0.75,"ops":1.5},"rowScope":"team"},{"season":1934,"seasonType":"REG","team":"BAL","gamesPlayed":5,"values":{"g":5,"ab":3,"r":0,"h":1,"doubles":1,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":1,"so":0,"avg":0.333,"obp":0.5,"slg":0.667,"ops":1.167},"rowScope":"team"}],"careerTotals":{"REG":{"g":574,"ab":1319,"r":135,"h":353,"doubles":60,"triples":11,"hr":3,"rbi":144,"sb":29,"bb":127,"so":97,"avg":0.268,"obp":0.339,"slg":0.337,"ops":0.676}}},{"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":1911,"seasonType":"REG","team":"SF","values":{"ops_plus":74,"era_plus":null},"rowScope":"team"},{"season":1912,"seasonType":"REG","team":"SF","values":{"ops_plus":66,"era_plus":null},"rowScope":"team"},{"season":1913,"seasonType":"REG","team":"SF","values":{"ops_plus":99,"era_plus":null},"rowScope":"team"},{"season":1914,"seasonType":"REG","team":"St. Louis Terriers","values":{"ops_plus":109,"era_plus":null},"rowScope":"team"},{"season":1915,"seasonType":"REG","team":"St. Louis Terriers","values":{"ops_plus":116,"era_plus":null},"rowScope":"team"},{"season":1916,"seasonType":"REG","team":"BAL","values":{"ops_plus":81,"era_plus":null},"rowScope":"team"},{"season":1917,"seasonType":"REG","team":"BAL","values":{"ops_plus":79,"era_plus":null},"rowScope":"team"},{"season":1924,"seasonType":"REG","team":"SF","values":{"ops_plus":122,"era_plus":null},"rowScope":"team"},{"season":1925,"seasonType":"REG","team":"SF","values":{"ops_plus":91,"era_plus":null},"rowScope":"team"},{"season":1926,"seasonType":"REG","team":"SF","values":{"ops_plus":-19,"era_plus":null},"rowScope":"team"},{"season":1927,"seasonType":"REG","team":"BOS","values":{"ops_plus":78,"era_plus":null},"rowScope":"team"},{"season":1929,"seasonType":"REG","team":"CLE","values":{"ops_plus":69,"era_plus":null},"rowScope":"team"},{"season":1930,"seasonType":"REG","team":"CLE","values":{"ops_plus":280,"era_plus":null},"rowScope":"team"},{"season":1934,"seasonType":"REG","team":"BAL","values":{"ops_plus":212,"era_plus":null},"rowScope":"team"}],"careerTotals":{"REG":{"ops_plus":95,"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":"2026-07-03T07:19:43.364Z"}