Non-MLB
Although they have not thrown an MLB pitch in 2026, Daniel Mengden threw 6,339 pitches that were tracked by the PITCHf/x system between 2016 and 2025, including pitches thrown in the MLB Regular Season, Spring Training and Fall/Winter Ball. In 2025, they relied primarily on their Fourseam Fastball (90mph) and Cutter (87mph), also mixing in a Slider (83mph) and Curve (73mph). He also rarely threw a Change (86mph) and Sinker (88mph).
In 2025, compared to other RHP:
Their fourseam fastball is basically never swung at and missed compared to other pitchers' fourseamers, has slightly below average velo and has some added backspin. Their cutter is basically never swung at and missed compared to other pitchers' cutters, results in more flyballs compared to other pitchers' cutters, has slightly below average velo, has some natural sink and has strong cutting action. Their slider is basically never swung at and missed compared to other pitchers' sliders, results in somewhat more groundballs compared to other pitchers' sliders and has some two-plane movement. Their curve has an exceptional bite, comes in below hitting speed, generates an extremely high number of swings & misses compared to other pitchers' curves, results in more flyballs compared to other pitchers' curves and has slight glove-side movement. Their change (take this with a grain of salt because they've only thrown 9 of them in 2025) results in more flyballs compared to other pitchers' changeups, is slightly firmer than usual and has slight armside fade. Their sinker (take this with a grain of salt because they've only thrown 8 of them in 2025) is so slow that it is substantially gravitational, is basically never swung at and missed compared to other pitchers' sinkers, is an extreme flyball pitch compared to other pitchers' sinkers and has less armside run than typical.