New York Yankees
Although he has not thrown an MLB pitch in 2020, Aroldis Chapman threw 10,064 pitches that were tracked by the PITCHf/x system between 2009 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 Fourseam Fastball (98mph) and Slider (85mph), also mixing in a Sinker (100mph). He also rarely threw a Change (88mph).
Basic description of 2019 pitches compared to other LHP:
His fourseam fastball generates an extremely high number of swings & misses compared to other pitchers' fourseamers, is straight as an arrow, is thrown at a speed that's borderline unfair, results in somewhat more groundballs compared to other pitchers' fourseamers and has some added backspin. His slider sweeps across the zone, generates more whiffs/swing compared to other pitchers' sliders, is much harder than usual and has some two-plane movement. His sinker generates an extremely high number of swings & misses compared to other pitchers' sinkers, is thrown at a speed that's borderline unfair, has surprisingly little armside run and has little sinking action compared to a true sinker. His change (take this with a grain of salt because he's only thrown 1 of them in 2019) is thrown extremely hard, is basically never swung at and missed compared to other pitchers' changeups, has surprising cut action and is an extreme flyball pitch compared to other pitchers' changeups.