Although he has not thrown an MLB pitch in 2020, Jose Alvarez threw 5,534 pitches that were tracked by the PITCHf/x system between 2013 and 2019, including pitches thrown in the MLB Regular Season, the MLB Postseason, The World Baseball Classic and Spring Training. In 2019, he relied primarily on his Sinker (92mph), Change (82mph) and Slider (84mph), also mixing in a Fourseam Fastball (92mph) and Cutter (86mph). He also rarely threw a Curve (83mph).
Basic description of 2019 pitches compared to other LHP:
His sinker has slightly above average velo. His change is a real worm killer that generates an extreme number of groundballs compared to other pitchers' changeups and dives down out of the zone. His slider generates fewer whiffs/swing compared to other pitchers' sliders and results in somewhat more flyballs compared to other pitchers' sliders. His fourseam fastball has essentially average velo. His cutter results in more flyballs compared to other pitchers' cutters and has strong cutting action. His curve (take this with a grain of salt because he's only thrown 2 of them in 2019) is thrown extremely hard, has very little depth, is basically never swung at and missed compared to other pitchers' curves and is an extreme flyball pitch compared to other pitchers' curves.