Seattle Mariners
Jhonathan Díaz has thrown 5,293 pitches that have been tracked by the PITCHf/x system between 2021 and 2025, including pitches thrown in the MLB Regular Season and Spring Training. In 2025, they have relied primarily on their Slider (78mph) and Sinker (88mph), also mixing in a Fourseam Fastball (90mph) and Change (82mph). He also rarely throws a Curve (72mph).
In 2025, compared to other LHP:
Their slider comes in below hitting speed, sweeps across the zone, generates fewer whiffs/swing compared to other pitchers' sliders, results in somewhat more flyballs compared to other pitchers' sliders and has some two-plane movement. Their sinker has heavy sinking action, has less armside run than typical, results in somewhat more flyballs compared to other pitchers' sinkers and has slightly below average velo. Their fourseam fastball has some natural sinking action, has slightly below average velo and has slightly less natural movement than typical. Their change dives down out of the zone, results in more flyballs compared to other pitchers' changeups and has slight cut action. Their curve (take this with a grain of salt because they've only thrown 16 of them in 2025) has an exceptional bite, comes in below hitting speed, is basically never swung at and missed compared to other pitchers' curves and has sweeping glove-side movement.