Non-MLB
Although they have not thrown an MLB pitch in 2024, Rafael Perez threw 4,480 pitches that were tracked by the PITCHf/x system between 2007 and 2014, including pitches thrown in the MLB Regular Season and Spring Training. In 2014, they relied primarily on their Slider (82mph) and Fourseam Fastball (88mph).
In 2014, compared to other LHP:
Their slider (take this with a grain of salt because they've only thrown 15 of them in 2014) generates an extremely high number of swings & misses compared to other pitchers' sliders and results in more flyballs compared to other pitchers' sliders. Their fourseam fastball (take this with a grain of salt because they've only thrown 9 of them in 2014) generates an extremely high number of swings & misses compared to other pitchers' fourseamers, has heavy sinking action, is straight as an arrow, is an extreme flyball pitch compared to other pitchers' fourseamers and has below average velo.