Boston Red Sox
Wyatt Mills has thrown 1,348 pitches that have been tracked by the PITCHf/x system between 2020 and 2025, including pitches thrown in the MLB Regular Season and Spring Training. In 2025, they have relied primarily on their Fourseam Fastball (92mph), Sinker (90mph) and Slider (78mph), also mixing in a Change (84mph).
In 2025, compared to other RHP:
Their fourseam fastball has heavy sinking action, has an obvious tail, generates a high number of swings & misses compared to other pitchers' fourseamers, has essentially average velo and results in somewhat more flyballs compared to other pitchers' fourseamers. Their sinker generates an extremely high number of swings & misses compared to other pitchers' sinkers, has heavy sinking action, is a real worm killer that generates an extreme number of groundballs compared to other pitchers' sinkers, has slight armside run and has slightly below average velo. Their slider comes in below hitting speed, sweeps across the zone, generates fewer whiffs/swing compared to other pitchers' sliders, has less than expected depth and results in somewhat more groundballs compared to other pitchers' sliders. Their change (take this with a grain of salt because they've only thrown 15 of them in 2025) is basically never swung at and missed compared to other pitchers' changeups, dives down out of the zone, results in more flyballs compared to other pitchers' changeups and has slight armside fade.