David Hess has thrown 2,551 pitches that have been tracked by the PITCHf/x system between 2018 and 2019, all of them occuring in the MLB Regular Season. In 2019, he has relied primarily on his Fourseam Fastball (93mph) and Slider (83mph), also mixing in a Change (85mph) and Sinker (93mph). He also rarely throws a Curve (77mph).
Basic description of 2019 pitches compared to other RHP:
His fourseam fastball has less armside movement than typical, has essentially average velo and results in somewhat more flyballs compared to other pitchers' fourseamers. His slider is an extreme flyball pitch compared to other pitchers' sliders. His change is basically never swung at and missed compared to other pitchers' changeups and results in more flyballs compared to other pitchers' changeups. His sinker has little sinking action compared to a true sinker and results in somewhat more flyballs compared to other pitchers' sinkers. His curve generates more whiffs/swing compared to other pitchers' curves and has little depth.