Felix Hernandez has thrown 33,215 pitches that have been tracked by the PITCHf/x system between 2007 and 2017, including pitches thrown in the MLB Regular Season, the MLB Postseason, The World Baseball Classic and Spring Training. In 2017, he has relied primarily on his Fourseam Fastball (92mph), Sinker (91mph), Curve (81mph) and Change (88mph), also mixing in a Slider (86mph). He also rarely throws a Cutter (87mph).
Basic description of 2017 pitches compared to other RHP:
His fourseam fastball generates a very high amount of groundballs compared to other pitchers' fourseamers, has less armside movement than typical, has some natural sinking action and has essentially average velo. His sinker is basically never swung at and missed compared to other pitchers' sinkers, has less armside run than typical and results in somewhat more flyballs compared to other pitchers' sinkers. His curve is slightly harder than usual. His change dives down out of the zone, is much firmer than usual and has slight cut action. His slider is basically never swung at and missed compared to other pitchers' sliders and has less than expected depth. His cutter (take this with a grain of salt because he's only thrown 9 of them in 2017) has heavy sink, is basically never swung at and missed compared to other pitchers' cutters and is an extreme flyball pitch compared to other pitchers' cutters.