Kansas City Royals
Danny Duffy has thrown 17,500 pitches that have been 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, Spring Training and Fall/Winter Ball. In 2019, he has relied primarily on his Fourseam Fastball (93mph) and Slider (86mph), also mixing in a Curve (77mph), Sinker (93mph) and Change (85mph).
Basic description of 2019 pitches compared to other LHP:
His fourseam fastball has less armside movement than typical, results in more flyballs compared to other pitchers' fourseamers and has slightly above average velo. His slider is much harder than usual. His curve has an exceptional bite, is an extreme flyball pitch compared to other pitchers' curves and has slight glove-side movement. His sinker has surprisingly little armside run, has little sinking action compared to a true sinker and has slightly above average velo. His change is a real worm killer that generates an extreme number of groundballs compared to other pitchers' changeups, generates fewer whiffs/swing compared to other pitchers' changeups and is slightly firmer than usual.