Non-MLB
Devin Smeltzer has thrown 5,553 pitches that have been tracked by the PITCHf/x system between 2019 and 2025, including pitches thrown in the MLB Regular Season, Spring Training and Fall/Winter Ball. In 2025, they have relied primarily on their Fourseam Fastball (89mph) and Change (83mph), also mixing in a Curve (77mph), Cutter (85mph) and Slider (80mph). He also rarely throws a Sinker (89mph).
In 2025, compared to other LHP:
Their fourseam fastball has heavy sinking action and has slightly below average velo. Their change is a real worm killer that generates an extreme number of groundballs compared to other pitchers' changeups, dives down out of the zone and has slight cut action. Their curve results in somewhat more flyballs compared to other pitchers' curves and has slight glove-side movement. Their cutter generates fewer whiffs/swing compared to other pitchers' cutters and results in more flyballs compared to other pitchers' cutters. Their slider sweeps across the zone and results in somewhat more flyballs compared to other pitchers' sliders. Their sinker (take this with a grain of salt because they've only thrown 5 of them in 2025) has heavy sinking action, is basically never swung at and missed compared to other pitchers' sinkers, is an extreme flyball pitch compared to other pitchers' sinkers, has less armside run than typical and has slightly below average velo.