Atlas / MLB pitch types / pitch_type:SI

descriptive only

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

as of 2025-09-28

pitch_type:SIMLB pitch typesas of 2025-09-28

n pitches

107136

pct of all pitches

15.46

velo p10

90.3

velo p50

velo p90

97.2

count leverage %

pitcher_ahead: 20.3, even: 47.1, pitcher_behind: 32.7

count state %

0-0: 31.3, 0-1: 11.97, 0-2: 2.84, 1-0: 11.87, 1-1: 9.4, 1-2: 5.44, 2-0: 4.61, 2-1: 5.97, 2-2: 6.39, 3-0: 1.49, 3-1: 3.15, 3-2: 5.57

outcome mix %

strike: 46.7, ball: 32.2, in-play: 21.1

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/si.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.