Rob Zastryzny has thrown 829 pitches that have been tracked by the PITCHf/x system between 2016 and 2022, including pitches thrown in the MLB Regular Season and Spring Training. In 2022, they have relied primarily on their Fourseam Fastball (92mph), Slider (80mph) and Change (78mph), also mixing in a Cutter (88mph).
In 2022, compared to other LHP:
His fourseam fastball has much less armside movement than typical, has some natural sinking action, has essentially average velo and results in somewhat more groundballs compared to other pitchers' fourseamers. His slider sweeps across the zone and has some two-plane movement. His change is a real worm killer that generates an extreme number of groundballs compared to other pitchers' changeups, has below average velo, generates more whiffs/swing compared to other pitchers' changeups and has some natural sink to it. His cutter (take this with a grain of salt because he's only thrown 16 of them in 2022) has sweeping cut action, is an extreme flyball pitch compared to other pitchers' cutters, has slightly above average velo and has some natural sink.