Non-MLB
Although they have not thrown an MLB pitch in 2024, Ronald Belisario threw 5,513 pitches that were tracked by the PITCHf/x system between 2009 and 2015, including pitches thrown in the MLB Regular Season and Spring Training. In 2015, they relied primarily on their Sinker (93mph), also mixing in a Slider (85mph) and Fourseam Fastball (93mph). He also rarely threw a Change (85mph).
In 2015, compared to other RHP:
Their sinker has heavy sinking action, is an extreme flyball pitch compared to other pitchers' sinkers and has slight armside run. Their slider (take this with a grain of salt because they've only thrown 13 of them in 2015) is an extreme flyball pitch compared to other pitchers' sliders, has primarily 12-6 movement and has some two-plane movement. Their fourseam fastball (take this with a grain of salt because they've only thrown 9 of them in 2015) has heavy sinking action, is basically never swung at and missed compared to other pitchers' fourseamers, is an extreme flyball pitch compared to other pitchers' fourseamers, has essentially average velo and has slight armside run. Their change (take this with a grain of salt because they've only thrown 4 of them in 2015) generates an extremely high number of swings & misses compared to other pitchers' changeups, has surprising cut action, dives down out of the zone and results in more flyballs compared to other pitchers' changeups.