Atlas / MLB pitch types / pitch_type:FO

descriptive only

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

as of 2025-09-28

pitch_type:FOMLB pitch typesas of 2025-09-28

n pitches

721

pct of all pitches

0.1

velo p10

80.9

velo p50

velo p90

85.6

count leverage %

pitcher_ahead: 47, even: 40.5, pitcher_behind: 12.5

count state %

0-0: 10.96, 0-1: 16.92, 0-2: 12.62, 1-0: 4.44, 1-1: 13.59, 1-2: 17.48, 2-0: 0.69, 2-1: 2.36, 2-2: 15.95, 3-0: 0.14, 3-1: 0.55, 3-2: 4.3

outcome mix %

strike: 43.3, ball: 41.7, in-play: 15

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/fo.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.