Player stats
Unknown pitch type: Average Spin 2021
How fast the ball spins, measured in turns per minute. Only measured pitches are included. More spin is not always better. Uses pitches recorded as unknown pitch type.
At least 100 pitches of this type with a spin measurement in this season. 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.
No 2021 data
MLBDB does not have Unknown pitch type: Average Spin leaders for the 2021 season.
Understanding Unknown pitch type: Average Spin
How fast the ball spins, measured in turns per minute. Only measured pitches are included. More spin is not always better. Uses pitches recorded as unknown pitch type.
Formula: Sum of recorded spin rates ÷ pitches with spin measurements
Read rates alongside playing time. A small sample can produce an extreme result, and a missing value is different from zero.
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. Source refresh time is not available.