Although they have not thrown an MLB pitch in 2023, Iván Nova threw 20,845 pitches that were tracked by the PITCHf/x system between 2010 and 2021, including pitches thrown in the MLB Regular Season and Spring Training. In 2021, they relied primarily on their Sinker (92mph) and Fourseam Fastball (93mph), also mixing in a Change (87mph) and Curve (80mph). He also rarely threw a Slider (87mph).
In 2021, compared to other RHP:
Their sinker is a real worm killer that generates an extreme number of groundballs compared to other pitchers' sinkers, has an obvious tail and has some natural sinking action. Their fourseam fastball has heavy sinking action, has essentially average velo and has slight armside run. Their change generates a high number of swings & misses compared to other pitchers' changeups, is slightly firmer than usual, has slight armside fade and has some natural sink to it. Their curve generates an extremely high number of swings & misses compared to other pitchers' curves, has primarily 12-6 movement and results in more flyballs compared to other pitchers' curves. Their slider (take this with a grain of salt because they've only thrown 4 of them in 2021) is basically never swung at and missed compared to other pitchers' sliders, is an extreme flyball pitch compared to other pitchers' sliders, has primarily 12-6 movement, is much harder than usual and has less than expected depth.