Non-MLB
Devin Smeltzer has thrown 5,311 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), Slider (80mph) and Cutter (85mph). He also rarely throws a Sinker (89mph).
In 2025, compared to other LHP:
Their fourseam fastball has heavy sinking action, generates more whiffs/swing compared to other pitchers' fourseamers 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 is a prototypical pitch with few remarkable qualities. Their slider is basically never swung at and missed compared to other pitchers' sliders, results in more flyballs compared to other pitchers' sliders and has short glove-side cut. Their cutter results in somewhat more flyballs compared to other pitchers' cutters, has slightly below average velo, has some natural sink and has strong cutting action. 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.