Non-MLB
Kevin Kelly has thrown 171 pitches that have been tracked by the PITCHf/x system between 2023 and 2026, including pitches thrown in The World Baseball Classic and Fall/Winter Ball. In 2026, they have relied primarily on their Slider (85mph), Fourseam Fastball (91mph) and Curve (77mph). He also rarely throws a Change (83mph).
In 2026, compared to other RHP:
Their slider (take this with a grain of salt because they've only thrown 10 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, has less than expected depth and has primarily 12-6 movement. Their fourseam fastball (take this with a grain of salt because they've only thrown 7 of them in 2026) is basically never swung at and missed compared to other pitchers' fourseamers, is an extreme flyball pitch compared to other pitchers' fourseamers, has some natural sinking action, has slight armside run and has slightly below average velo. 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 and has slight glove-side movement. Their change (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' changeups, has an obvious armside fade, results in more flyballs compared to other pitchers' changeups and has some natural sink to it.