No. 1 / Four-seam fastball: Pitches with Extension / 2025
1651
Season leader
Player stats
Four-seam fastball: Pitches with Extension 2025
Number of pitches with a usable release extension measurement. This is the sample behind average extension. Uses pitches recorded as four-seam fastball.
Recorded pitch types. Usage divides by all delivered pitches, including unknown types. Speed is in mph, spin in rpm and extension in feet. Averages use measured pitches only. Whiffs divide misses by swings. Data through December 31, 2025. Data refreshed Sep 9, 2026, 10:16 AM UTC.
- FF ext count
- Number of pitches with a usable release extension measurement. This is the sample behind average extension. Uses pitches recorded as four-seam fastball.
Understanding Four-seam fastball: Pitches with Extension
Number of pitches with a usable release extension measurement. This is the sample behind average extension. Uses pitches recorded as four-seam fastball.
Season rankings use regular-season records. A player has one combined row across teams; the team label identifies the associated team, not a separate team stint.
Source: MLB statistics and MLBDB derived measures. Formulas describe the measure above. Data refreshed Sep 9, 2026, 10:16 AM UTC.