Boston Red Sox
Zack Kelly has thrown 216 pitches that have been tracked by the PITCHf/x system in 2022, including pitches thrown in the MLB Regular Season and Spring Training. In 2022, they have relied primarily on their Fourseam Fastball (95mph) and Change (82mph), also mixing in a Slider (86mph). He also rarely throws a Sinker (96mph).
In 2022, compared to other RHP:
His fourseam fastball results in many more groundballs compared to other pitchers' fourseamers, has some natural sinking action, has slight armside run and has slightly above average velo. His change is basically never swung at and missed compared to other pitchers' changeups, has an obvious armside fade, has slightly below average velo and has some natural sink to it. His slider is an extreme flyball pitch compared to other pitchers' sliders, generates fewer whiffs/swing compared to other pitchers' sliders, has short glove-side cut and has some two-plane movement. His sinker (take this with a grain of salt because he's only thrown 4 of them in 2022) is basically never swung at and missed compared to other pitchers' sinkers, has an obvious tail, is an extreme flyball pitch compared to other pitchers' sinkers and is blazing fast.