Reference
Glossary
Every statistic here is derived from play-by-play rather than copied from a published table. These are the ones worth defining.
- wOBA
- Weighted on-base average. Each way of reaching base is worth its measured run value rather than being counted equally, and the scale is solved so league wOBA equals league OBP.
- wRC+
- Runs created per plate appearance, adjusted for ballpark and league, on a scale where 100 is average and every point is a percent.
- dbWAR
- This project’s own wins above replacement: batting runs, baserunning and a positional adjustment against replacement level. It contains no fielding.
- FIP
- Fielding independent pitching. Rebuilds an ERA from only strikeouts, walks, hit batters and home runs — the outcomes a pitcher controls without his defence.
- Barrel
- A batted ball whose exit velocity and launch angle have historically produced at least a .500 average and 1.500 slugging: 98 mph within 26–30°, widening to 8–50° by 116.
- Sweet spot
- A batted ball launched between 8 and 32 degrees, the band where hits concentrate, at any exit velocity.
- Hard hit
- A batted ball struck at 95 mph or better.
- Whiff rate
- Swings that missed, as a share of swings. SwStr% is the same misses as a share of every pitch thrown.
- RISP
- Runners in scoring position — a runner on second, third, or both.
- RE24
- The 24 base-out states, and the runs a team scores on average from each one. Every linear weight here is measured from these rather than assumed.