Although they have not thrown an MLB pitch in 2023, Zach Jackson threw 904 pitches that were tracked by the PITCHf/x system between 2021 and 2022, including pitches thrown in the MLB Regular Season and Spring Training. In 2022, they relied primarily on their Fourseam Fastball (95mph) and Curve (85mph). He also rarely threw a Change (89mph).
In 2022, compared to other RHP:
His fourseam fastball generates a high number of swings & misses compared to other pitchers' fourseamers, has less armside movement than typical, results in more flyballs compared to other pitchers' fourseamers, has slightly above average velo and has some added backspin. His curve is thrown extremely hard, generates a high number of swings & misses compared to other pitchers' curves, has primarily 12-6 movement and has little depth. His change (take this with a grain of salt because he's only thrown 9 of them in 2022) is thrown extremely hard, results in more flyballs compared to other pitchers' changeups, has slight cut action and has some natural sink to it.