Glossary

Common sports terminology used in the API responses, in plain English.

General

• Box score — A statistical summary of a game, broken down by team and player.
• Play-by-play — A chronological list of every notable event in a game.
• Standings — The ranked order of teams by wins, points, or league-specific tiebreakers.

NBA

• PER — Player Efficiency Rating; a single-number summary of per-minute production.
• TS% — True Shooting Percentage; weighted shooting accuracy that accounts for 2s, 3s, and free throws.
• USG% — Usage Rate; the percentage of team plays a player "uses" while on court.
• +/- — Point differential while the player is on the court.

NFL

• EPA — Expected Points Added; the change in expected points a play produces.
• WPA — Win Probability Added; the change in win probability a play produces.
• YAC — Yards After Catch.
• Air yards — Yards in the air on a pass play (excluding YAC).

MLB

• Statcast — MLB's league-wide pitch and batted-ball tracking system.
• wOBA — Weighted On-Base Average; a more accurate version of OBP that weights each outcome.
• xwOBA — Expected wOBA based on exit velocity and launch angle.
• FIP — Fielding Independent Pitching; ERA-scaled estimate based on outcomes a pitcher controls.

NHL

• Corsi — Shot attempts (on goal, missed, blocked).
• Fenwick — Like Corsi, excluding blocked shots.
• xG — Expected Goals; modeled probability that a shot becomes a goal.
• PDO — On-ice shooting % + on-ice save %. Reverts to 100 over time; far-from-100 suggests luck.

Soccer

• xG / xA — Expected goals / assists.
• PPDA — Passes per defensive action; lower means more aggressive pressing.
• BTTS — "Both teams to score", a common betting market.