New York Yankees
J.A. Happ has thrown 28,218 pitches that have been tracked by the PITCHf/x system between 2008 and 2019, including pitches thrown in the MLB Regular Season, the MLB Postseason and Spring Training. In 2019, he has relied primarily on his Fourseam Fastball (92mph) and Sinker (89mph), also mixing in a Slider (85mph) and Change (86mph). He also rarely throws a Curve (82mph).
Basic description of 2019 pitches compared to other LHP:
His fourseam fastball generates a high number of swings & misses compared to other pitchers' fourseamers, results in more flyballs compared to other pitchers' fourseamers, has essentially average velo and has slightly less natural movement than typical. His sinker generates a very high amount of groundballs compared to other pitchers' sinkers, has less armside run than typical and has some natural sinking action. His slider is basically never swung at and missed compared to other pitchers' sliders, results in many more groundballs compared to other pitchers' sliders and has less than expected depth. His change is a real worm killer that generates an extreme number of groundballs compared to other pitchers' changeups, is much firmer than usual and has some natural sink to it. His curve (take this with a grain of salt because he's only thrown 13 of them in 2019) is thrown extremely hard, generates an extremely high number of swings & misses compared to other pitchers' curves, is an extreme flyball pitch compared to other pitchers' curves, has little depth and has primarily 12-6 movement.