Although he has not thrown an MLB pitch in 2020, Juan Nicasio threw 12,790 pitches that were tracked by the PITCHf/x system between 2011 and 2019, including pitches thrown in the MLB Regular Season and Spring Training. In 2019, he relied primarily on his Fourseam Fastball (94mph) and Slider (87mph). He also rarely threw a Sinker (93mph) and Change (88mph).
Basic description of 2019 pitches compared to other RHP:
His fourseam fastball has some natural sinking action, has essentially average velo and results in somewhat more groundballs compared to other pitchers' fourseamers. His slider is a real worm killer that generates an extreme number of groundballs compared to other pitchers' sliders, generates fewer whiffs/swing compared to other pitchers' sliders, is much harder than usual, has less than expected depth and has primarily 12-6 movement. His sinker generates an extremely high number of swings & misses compared to other pitchers' sinkers and results in more flyballs compared to other pitchers' sinkers. His change (take this with a grain of salt because he's only thrown 5 of them in 2019) is basically never swung at and missed compared to other pitchers' changeups, is much firmer than usual, results in more flyballs compared to other pitchers' changeups and has a lot of backspin.