Kansas City Royals
Jonathan Heasley has thrown 4,565 pitches that have been tracked by the PITCHf/x system between 2021 and 2026, including pitches thrown in the MLB Regular Season and Spring Training. In 2026, they have relied primarily on their Fourseam Fastball (94mph) and Curve (81mph), also mixing in a Change (87mph) and Slider (87mph).
In 2026, compared to other RHP:
Their fourseam fastball (take this with a grain of salt because they've only thrown 7 of them in 2026) has essentially average velo and results in somewhat more groundballs compared to other pitchers' fourseamers. Their curve (take this with a grain of salt because they've only thrown 5 of them in 2026) is basically never swung at and missed compared to other pitchers' curves, results in more flyballs compared to other pitchers' curves, has a sharp downward bite, is slightly harder than usual and has primarily 12-6 movement. Their change (take this with a grain of salt because they've only thrown 2 of them in 2026) is basically never swung at and missed compared to other pitchers' changeups, has surprising cut action, dives down out of the zone, is much firmer than usual and results in more flyballs compared to other pitchers' changeups. Their slider (take this with a grain of salt because they've only thrown 1 of them in 2026) is basically never swung at and missed compared to other pitchers' sliders, is an extreme flyball pitch compared to other pitchers' sliders and is much harder than usual.