Atlas / MLB pitch types / pitch_type:FS

descriptive only

These are historical per-period rates and splits for pitch_type:FS, not a prediction and not an edge claim. descriptive_only: true.

as of 2025-09-28

pitch_type:FSMLB pitch typesas of 2025-09-28

n pitches

22473

pct of all pitches

3.24

velo p10

82.2

velo p50

86.3

velo p90

90.9

count leverage %

pitcher_ahead: 42.7, even: 39, pitcher_behind: 18.4

count state %

0-0: 14.29, 0-1: 16.94, 0-2: 10.52, 1-0: 7.56, 1-1: 13.01, 1-2: 15.2, 2-0: 1.66, 2-1: 4.38, 2-2: 11.67, 3-0: 0.1, 3-1: 0.85, 3-2: 3.8

outcome mix %

strike: 41.5, ball: 40.6, in-play: 18

sample floor -- all 19 pitch_type codes in the 2025 pull included, no exclusion (missing pitch_type kept as 'UNK'); smallest category n=7 (SC) -- small-n cards carry high sampling noise, shown for completeness not comparison. no per-pitch swing/miss field in this pull (no `description` column; `type` merges called+swinging+foul into one S bucket, `des` only fires on PA-ending pitches) -- outcome mix (ball/strike/in-play) substitutesdownload card PNG -> docs/img/atlas/mlb_pitch/by_type/fs.png

sample floor

as of 2025-09-28

An entity earns a descriptive card only after clearing a minimum-sample floor, so rates are not read off tiny samples. The floor for this pack is all 19 pitch_type codes in the 2025 pull included, no exclusion (missing pitch_type kept as 'UNK'); smallest category n=7 (SC) -- small-n cards carry high sampling noise, shown for completeness not comparison. no per-pitch swing/miss field in this pull (no `description` column; `type` merges called+swinging+foul into one S bucket, `des` only fires on PA-ending pitches) -- outcome mix (ball/strike/in-play) substitutes. Entities below the floor are deliberately left off -- we do not print rates we cannot stand behind.