David Hernandez has thrown 10,876 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 and Spring Training. In 2019, he has relied primarily on his Fourseam Fastball (94mph) and Cutter (87mph), also mixing in a Curve (83mph) and Sinker (94mph). He also rarely throws a Change (88mph).
Basic description of 2019 pitches compared to other RHP:
His fourseam fastball generates a high number of swings & misses compared to other pitchers' fourseamers, has essentially average velo and has slight armside run. His cutter generates an extremely high number of swings & misses compared to other pitchers' cutters, is an extreme flyball pitch compared to other pitchers' cutters, has slightly below average velo and has some natural sink. His curve generates fewer whiffs/swing compared to other pitchers' curves, is much harder than usual, has little depth and has primarily 12-6 movement. His sinker results in more flyballs compared to other pitchers' sinkers, has less armside run than typical, has little sinking action compared to a true sinker and has slightly above average velo. His change (take this with a grain of salt because he's only thrown 2 of them in 2019) is basically never swung at and missed compared to other pitchers' changeups, is much firmer than usual, results in more flyballs compared to other pitchers' changeups and has a lot of backspin.