Although he has not thrown an MLB pitch in 2018, Gerrit Cole threw 12,450 pitches that were tracked by the PITCHf/x system between 2011 and 2017, including pitches thrown in the MLB Regular Season, the MLB Postseason and Fall/Winter Ball. In 2017, he relied primarily on his Fourseam Fastball (96mph), also mixing in a Slider (89mph), Sinker (96mph), Curve (81mph) and Change (89mph).
Basic description of 2017 pitches compared to other RHP:
His fourseam fastball has well above average velo and has slight armside run. His slider is thrown extremely hard and generates a very high amount of groundballs compared to other pitchers' sliders. His sinker is blazing fast and has slight armside run. His curve is slightly harder than usual and has slight glove-side movement. His change is thrown extremely hard and has slight armside fade.