Although they have not thrown an MLB pitch in 2023, Matt Swarmer threw 657 pitches that were tracked by the PITCHf/x system in 2022, all of them occuring in the MLB Regular Season. In 2022, they relied primarily on their Slider (82mph) and Fourseam Fastball (91mph). He also rarely threw a Change (86mph).
In 2022, compared to other RHP:
His slider is an extreme flyball pitch compared to other pitchers' sliders and has short glove-side cut. His fourseam fastball has less armside movement than typical, results in many more groundballs compared to other pitchers' fourseamers, has some natural sinking action and has slightly below average velo. His change (take this with a grain of salt because he's only thrown 12 of them in 2022) is basically never swung at and missed compared to other pitchers' changeups, has surprising cut action, results in more flyballs compared to other pitchers' changeups and is slightly firmer than usual.