Descriptive only — these are measured pitch-level distributions, not projections.
MLB pitch types · MLB · as of 2025-09-28
Four-Seam Fastball (FF)
Historical measurements from this snapshot.
- Pitches thrown
- 220235Percentile rank 100 among 19 measured profilespct 100 of 19 measured
- Share of all pitches
- 31.78%Percentile rank 100 among 19 measured profilespct 100 of 19 measured
- Velocity, 10th percentile
- 91.3 mphPercentile rank 100 among 19 measured profilespct 100 of 19 measured
- Velocity, median
- 94.5 mphPercentile rank 100 among 19 measured profilespct 100 of 19 measured
- Velocity, 90th percentile
- 97.7 mphPercentile rank 100 among 19 measured profilespct 100 of 19 measured
Pitch share by count leverage
| pitcher_ahead | 27.6% |
|---|---|
| even | 43.3% |
| pitcher_behind | 29.0% |
Pitch share by count state
| 0-0 | 26.4% |
|---|---|
| 0-1 | 11.5% |
| 0-2 | 6.7% |
| 1-0 | 9.4% |
| 1-1 | 8.8% |
| 1-2 | 9.4% |
| 2-0 | 3.9% |
| 2-1 | 5.0% |
| 2-2 | 8.1% |
| 3-0 | 2.0% |
| 3-1 | 2.8% |
| 3-2 | 5.8% |
Pitch outcome mix
| strike | 49.6% |
|---|---|
| ball | 34.0% |
| in-play | 16.4% |
Balls in count, Pitch types used, Strikes in count, Most common pitch type, Most common pitch type share, Velocity percentiles by pitch type not applicable to MLB pitch types.
Percentiles are calculated within the MLB pitch types group using each field's measured values; higher is only higher, not a quality judgement.
What stands out
- It is the sport's default: 220,235 four-seamers, 31.78% of everything thrown.
- Leverage barely moves it -- 27.6% ahead, 43.3% even, 29.0% behind -- the flattest count profile of the four pitches profiled here.
- Median velocity 94.5 mph; outcomes split 49.6% strike, 34.0% ball, 16.4% in play.
Reading note
Descriptive only, over a single 2025 Statcast pull. The count-leverage shares are of this pitch's OWN usage (what share of four-seamers fall in each leverage class) -- they are not the share of any given count that is a four-seam. The strike bucket merges called, swinging, and foul strikes (no per-pitch swing/take in this corpus), so it is not a whiff rate. 'Flattest of these four' is scoped to the four pitch types written up in this pack. Not a prediction; descriptive only.