Non-MLB
Although they have not thrown an MLB pitch in 2024, Junior Fernández threw 2,445 pitches that were tracked by the PITCHf/x system between 2019 and 2023, including pitches thrown in the MLB Regular Season, Spring Training and Fall/Winter Ball. In 2023, they relied primarily on their Sinker (98mph) and Change (89mph), also mixing in a Fourseam Fastball (98mph) and Slider (87mph).
In 2023, compared to other RHP:
Their sinker is thrown at a speed that's borderline unfair, generates more whiffs/swing compared to other pitchers' sinkers and has slight armside run. Their change is thrown extremely hard, is a real worm killer that generates an extreme number of groundballs compared to other pitchers' changeups, generates a high number of swings & misses compared to other pitchers' changeups and has some natural sink to it. Their fourseam fastball is blazing fast, has some natural sinking action and has slight armside run. Their slider has primarily 12-6 movement, generates more whiffs/swing compared to other pitchers' sliders and results in somewhat more flyballs compared to other pitchers' sliders.