Data Sources
The records Statgami uses, what each contributes and when this build was produced.
Primary sources
Retrosheet, MLB Stats API and MLB Statcast measurements.
Historical games
Retrosheet supplies the historical game logs and play-by-play used by the rarity index. This build contains 223,281 game records in the main rarity denominator and 443,004 team-games in the shape index. Those totals differ because the unit and completeness requirements differ.
Live and current season
The MLB Stats API supplies schedules, live game state, box-score lines, player identifiers and current-season results. Statcast supplies tracked pitch and batted-ball measurements for the leaderboards.
Scope
Major leagues back to 1897, including the Negro Leagues (1920-1948), which MLB recognises as major league. Scope varies by index — each rarity states its own.
Build freshness
The checked indexes in this release were last built on .