Although they have not thrown an MLB pitch in 2023, Jason Alexander threw 1,195 pitches that were tracked by the PITCHf/x system between 2019 and 2022, including pitches thrown in the MLB Regular Season and Spring Training. In 2022, they relied primarily on their Sinker (92mph) and Slider (81mph), also mixing in a Change (81mph). He also rarely threw a Fourseam Fastball (93mph).
In 2022, compared to other RHP:
His sinker has heavy sinking action and has slight armside run. His slider sweeps across the zone, is an extreme flyball pitch compared to other pitchers' sliders, has below average velo and has some two-plane movement. His change has an obvious armside fade, dives down out of the zone and has slightly below average velo. His fourseam fastball generates an extremely high number of swings & misses compared to other pitchers' fourseamers, has heavy sinking action, has an obvious tail, is an extreme flyball pitch compared to other pitchers' fourseamers and has essentially average velo.