Non-MLB
Although they have not thrown an MLB pitch in 2024, Arnold Leon threw 456 pitches that were tracked by the PITCHf/x system between 2015 and 2016, all of them occuring in the MLB Regular Season. In 2016, they relied primarily on their Fourseam Fastball (92mph) and Sinker (93mph), also mixing in a Slider (86mph), Curve (77mph) and Cutter (86mph). He also rarely threw a Change (84mph).
In 2016, compared to other RHP:
Their fourseam fastball (take this with a grain of salt because they've only thrown 15 of them in 2016) is basically never swung at and missed compared to other pitchers' fourseamers, is an extreme flyball pitch compared to other pitchers' fourseamers, has good "rising" action and has essentially average velo. Their sinker (take this with a grain of salt because they've only thrown 11 of them in 2016) generates an extremely high number of swings & misses compared to other pitchers' sinkers, is an extreme flyball pitch compared to other pitchers' sinkers and has little sinking action compared to a true sinker. Their slider (take this with a grain of salt because they've only thrown 7 of them in 2016) is basically never swung at and missed compared to other pitchers' sliders, is an extreme flyball pitch compared to other pitchers' sliders, has short glove-side cut and has less than expected depth. Their curve (take this with a grain of salt because they've only thrown 7 of them in 2016) generates more whiffs/swing compared to other pitchers' curves, results in more flyballs compared to other pitchers' curves, has a sharp downward bite and has primarily 12-6 movement. Their cutter (take this with a grain of salt because they've only thrown 4 of them in 2016) has heavy sink, is basically never swung at and missed compared to other pitchers' cutters, has extreme cut action, is an extreme flyball pitch compared to other pitchers' cutters and has below average velo. Their change (take this with a grain of salt because they've only thrown 2 of them in 2016) is basically never swung at and missed compared to other pitchers' changeups and results in more flyballs compared to other pitchers' changeups.