Although he has not thrown an MLB pitch in 2019, Sean Manaea threw 7,234 pitches that were tracked by the PITCHf/x system between 2015 and 2018, including pitches thrown in the MLB Regular Season, Spring Training and Fall/Winter Ball. In 2018, he relied primarily on his Fourseam Fastball (91mph) and Change (83mph), also mixing in a Slider (79mph).
Basic description of 2018 pitches compared to other LHP:
His fourseam fastball has heavy sinking action, has essentially average velo and has slight armside run. His change has surprising cut action and dives down out of the zone. His slider has below average velo, has primarily 12-6 movement, results in somewhat more flyballs compared to other pitchers' sliders and has some two-plane movement.