Seattle Mariners
Jhonathan Díaz has thrown 7,568 pitches that have been tracked by the PITCHf/x system between 2021 and 2026, including pitches thrown in the MLB Regular Season, The World Baseball Classic and Spring Training. In 2026, they have relied primarily on their Slider (79mph) and Sinker (86mph), also mixing in a Cutter (85mph) and Change (79mph). He also rarely throws a Fourseam Fastball (89mph), Slow Curve (51mph) and Curve (74mph).
In 2026, compared to other LHP:
Their slider sweeps across the zone, has below average velo and results in somewhat more flyballs compared to other pitchers' sliders. Their sinker has heavy sinking action, is an extreme flyball pitch compared to other pitchers' sinkers, has surprisingly little armside run and has below average velo. Their cutter 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 some natural sink. Their change (take this with a grain of salt because they've only thrown 17 of them in 2026) is basically never swung at and missed compared to other pitchers' changeups, dives down out of the zone, is an extreme flyball pitch compared to other pitchers' changeups, has slight cut action and has slightly below average velo. Their fourseam fastball (take this with a grain of salt because they've only thrown 6 of them in 2026) has heavy sinking action, is basically never swung at and missed compared to other pitchers' fourseamers, is an extreme flyball pitch compared to other pitchers' fourseamers, has less armside movement than typical and has slightly below average velo. Their slow curve (take this with a grain of salt because they've only thrown 3 of them in 2026) is a real yakker that's separated from their other curveball due to its big drop and slow speed. Their curve (take this with a grain of salt because they've only thrown 1 of them in 2026) has an exceptional bite, is basically never swung at and missed compared to other pitchers' curves, has sweeping glove-side movement, is an extreme flyball pitch compared to other pitchers' curves and has slightly below average velo.