Although they have not thrown an MLB pitch in 2022, Ryan Cook threw 3,797 pitches that were tracked by the PITCHf/x system between 2011 and 2018, including pitches thrown in the MLB Regular Season and Spring Training. In 2018, they relied primarily on their Fourseam Fastball (95mph) and Slider (85mph), also mixing in a Sinker (95mph) and Change (89mph).
In 2018, compared to other RHP:
His fourseam fastball is a real worm killer that generates an extreme number of groundballs compared to other pitchers' fourseamers, has some natural sinking action and has slightly above average velo. His slider is a real worm killer that generates an extreme number of groundballs compared to other pitchers' sliders, has exceptional depth and has short glove-side cut. His sinker is an extreme flyball pitch compared to other pitchers' sinkers, has well above average velo and has some natural sinking action. His change (take this with a grain of salt because he's only thrown 17 of them in 2018) is thrown extremely hard, is basically never swung at and missed compared to other pitchers' changeups, generates a very high amount of groundballs compared to other pitchers' changeups and has some natural sink to it.