Arizona Diamondbacks
A.J. Puk has thrown 3,933 pitches that have been tracked by the PITCHf/x system between 2019 and 2025, including pitches thrown in the MLB Regular Season and Spring Training. In 2025, they have relied primarily on their Fourseam Fastball (96mph) and Slider (85mph). He also rarely throws a Sinker (94mph) and Splitter (89mph).
In 2025, compared to other LHP:
Their fourseam fastball is a real worm killer that generates an extreme number of groundballs compared to other pitchers' fourseamers, generates a high number of swings & misses compared to other pitchers' fourseamers, is blazing fast and has some natural sinking action. Their slider generates an extremely high number of swings & misses compared to other pitchers' sliders, has exceptional depth, has short glove-side cut and results in somewhat more flyballs compared to other pitchers' sliders. Their sinker (take this with a grain of salt because they've only thrown 2 of them in 2025) has heavy sinking action, is basically never swung at and missed compared to other pitchers' sinkers, is an extreme flyball pitch compared to other pitchers' sinkers, has surprisingly little armside run and has well above average velo. Their splitter (take this with a grain of salt because they've only thrown 2 of them in 2025) is thrown extremely hard, has dives down out of the zone, is basically never swung at and missed compared to other pitchers' splitters and is an extreme flyball pitch compared to other pitchers' splitters.