Non-MLB
Although they have not thrown an MLB pitch in 2024, JC Ramírez threw 4,816 pitches that were tracked by the PITCHf/x system between 2013 and 2023, including pitches thrown in the MLB Regular Season, The World Baseball Classic and Spring Training. In 2023, they relied primarily on their Fourseam Fastball (91mph), Curve (80mph) and Sinker (92mph), also mixing in a Slider (82mph) and Splitter (86mph).
In 2023, compared to other RHP:
Their fourseam fastball generates an extremely high number of swings & misses compared to other pitchers' fourseamers, has heavy sinking action, has much less armside movement than typical and has slightly below average velo. Their curve generates fewer whiffs/swing compared to other pitchers' curves, results in more flyballs compared to other pitchers' curves and has a sharp downward bite. Their sinker is basically never swung at and missed compared to other pitchers' sinkers and is an extreme flyball pitch compared to other pitchers' sinkers. Their slider (take this with a grain of salt because they've only thrown 11 of them in 2023) is basically never swung at and missed compared to other pitchers' sliders, is an extreme flyball pitch compared to other pitchers' sliders and has short glove-side cut. Their splitter (take this with a grain of salt because they've only thrown 8 of them in 2023) is basically never swung at and missed compared to other pitchers' splitters, is an extreme flyball pitch compared to other pitchers' splitters and is slightly firmer than usual.