{"sport":"mlb","slug":"greg-johnston","bio":{"fullName":"Greg Johnston","position":"CF","team":"MIN","heightInches":72,"weightLbs":175,"birthDate":"1955-02-12","rookieSeason":1979,"lastSeason":1981,"status":"RET","externalIds":{"mlbam":"116642","chadwick":"4f4ae95d","retro":"johng101","wikidata":"Q5605784"}},"draft":{"year":1975,"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":1979,"seasonType":"REG","team":"SF","gamesPlayed":42,"values":{"g":42,"ab":74,"r":5,"h":15,"doubles":2,"triples":0,"hr":1,"rbi":7,"sb":0,"bb":2,"so":17,"avg":0.203,"obp":0.224,"slg":0.27,"ops":0.494},"rowScope":"team"},{"season":1980,"seasonType":"REG","team":"MIN","gamesPlayed":14,"values":{"g":14,"ab":27,"r":3,"h":5,"doubles":3,"triples":0,"hr":0,"rbi":1,"sb":0,"bb":2,"so":4,"avg":0.185,"obp":0.233,"slg":0.296,"ops":0.529},"rowScope":"team"},{"season":1981,"seasonType":"REG","team":"MIN","gamesPlayed":7,"values":{"g":7,"ab":16,"r":2,"h":2,"doubles":0,"triples":0,"hr":0,"rbi":0,"sb":0,"bb":2,"so":5,"avg":0.125,"obp":0.222,"slg":0.125,"ops":0.347},"rowScope":"team"}],"careerTotals":{"REG":{"g":63,"ab":117,"r":10,"h":22,"doubles":5,"triples":0,"hr":1,"rbi":8,"sb":0,"bb":6,"so":26,"avg":0.188,"obp":0.226,"slg":0.256,"ops":0.482}}},{"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":1979,"seasonType":"REG","team":"SF","values":{"ops_plus":37,"era_plus":null},"rowScope":"team"},{"season":1980,"seasonType":"REG","team":"MIN","values":{"ops_plus":48,"era_plus":null},"rowScope":"team"},{"season":1981,"seasonType":"REG","team":"MIN","values":{"ops_plus":3,"era_plus":null},"rowScope":"team"}],"careerTotals":{"REG":{"ops_plus":35,"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":"2026-07-03T02:49:47.141Z"}