Seattle Mariners
Jhonathan Díaz has thrown 6,799 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 (79mph) and Sinker (87mph), also mixing in a Change (81mph). He also rarely throws a Fourseam Fastball (89mph), Curve (71mph), Slow Curve (56mph) and Cutter (84mph).
In 2025, compared to other LHP:
Their slider sweeps across the zone and has below average velo. Their sinker has heavy sinking action, has below average velo and has less armside run than typical. Their change dives down out of the zone, has slight cut action and results in somewhat more flyballs compared to other pitchers' changeups. Their fourseam fastball has heavy sinking action, is a real worm killer that generates an extreme number of groundballs compared to other pitchers' fourseamers, has slightly below average velo and has slightly less natural movement than typical. Their curve has an exceptional bite, comes in below hitting speed, has sweeping glove-side movement and results in somewhat more flyballs compared to other pitchers' curves. Their slow curve is a real yakker that's separated from their other curveball due to its big drop and slow speed. Their cutter (take this with a grain of salt because they've only thrown 1 of them in 2025) has heavy sink, is basically never swung at and missed compared to other pitchers' cutters, has extreme cut action, is an extreme flyball pitch compared to other pitchers' cutters and has slightly below average velo.