Although they have not thrown an MLB pitch in 2023, Carlos Hernández threw 2,741 pitches that were tracked by the PITCHf/x system between 2020 and 2022, including pitches thrown in the MLB Regular Season and Spring Training. In 2022, they relied primarily on their Fourseam Fastball (97mph) and Curve (82mph), also mixing in a Slider (86mph) and Splitter (85mph). He also rarely threw a Sinker (92mph).
In 2022, compared to other RHP:
His fourseam fastball is blazing fast and results in somewhat more flyballs compared to other pitchers' fourseamers. His curve has primarily 12-6 movement, is much harder than usual and has little depth. His slider has primarily 12-6 movement. His splitter results in more flyballs compared to other pitchers' splitters and has movement that suggests a lot of backspin. His sinker (take this with a grain of salt because he's only thrown 1 of them in 2022) is basically never swung at and missed compared to other pitchers' sinkers, is an extreme flyball pitch compared to other pitchers' sinkers, has little sinking action compared to a true sinker and has slight armside run.