Non-MLB
Although they have not thrown an MLB pitch in 2025, Devin Smeltzer threw 4,987 pitches that were tracked by the PITCHf/x system between 2019 and 2024, including pitches thrown in the MLB Regular Season and Spring Training. In 2024, they relied primarily on their Slider (76mph) and Fourseam Fastball (87mph), also mixing in a Sinker (87mph) and Change (81mph). He also rarely threw a Cutter (81mph) and Curve (75mph).
In 2024, compared to other LHP:
Their slider comes in below hitting speed, sweeps across the zone and results in more flyballs compared to other pitchers' sliders. Their fourseam fastball comes in below hitting speed and has heavy sinking action. Their sinker has heavy sinking action, has below average velo, generates more whiffs/swing compared to other pitchers' sinkers, results in more flyballs compared to other pitchers' sinkers and has less armside run than typical. Their change is a real worm killer that generates an extreme number of groundballs compared to other pitchers' changeups, has surprising cut action, dives down out of the zone and generates fewer whiffs/swing compared to other pitchers' changeups. Their cutter (take this with a grain of salt because they've only thrown 15 of them in 2024) comes in below hitting speed, has heavy sink, has extreme cut action, is an extreme flyball pitch compared to other pitchers' cutters and generates more whiffs/swing compared to other pitchers' cutters. Their curve (take this with a grain of salt because they've only thrown 6 of them in 2024) generates an extremely high number of swings & misses compared to other pitchers' curves, has sweeping glove-side movement, is an extreme flyball pitch compared to other pitchers' curves, has a sharp downward bite and has slightly below average velo.