Non-MLB
Although they have not thrown an MLB pitch in 2024, Jenrry Mejia threw 3,112 pitches that were tracked by the PITCHf/x system between 2010 and 2023, including pitches thrown in the MLB Regular Season, Spring Training and Fall/Winter Ball. In 2023, they relied primarily on their Cutter (91mph) and Slider (83mph).
In 2023, compared to other RHP:
Their cutter (take this with a grain of salt because they've only thrown 17 of them in 2023) is an extreme flyball pitch compared to other pitchers' cutters, generates more whiffs/swing compared to other pitchers' cutters and has slightly above average velo. Their slider (take this with a grain of salt because they've only thrown 8 of them in 2023) has exceptional depth.