Although he has not thrown an MLB pitch in 2017, Jose Fernandez threw 7,404 pitches that were tracked by the PITCHf/x system between 2012 and 2016, including pitches thrown in the MLB Regular Season, the MLB Postseason and Spring Training. In 2016, he relied primarily on his Fourseam Fastball (96mph) and Curve (85mph), also mixing in a Change (89mph). He also rarely threw a Sinker (93mph) and Slow Curve (75mph).
Basic description of 2016 pitches compared to other RHP:
His fourseam fastball generates more whiffs/swing compared to other pitchers' fourseamers, results in many more groundballs compared to other pitchers' fourseamers and has well above average velo. His curve is thrown extremely hard, generates an extremely high number of swings & misses compared to other pitchers' curves, has very little depth and has slight glove-side movement. His change is thrown extremely hard, results in somewhat more groundballs compared to other pitchers' changeups, has slight armside fade and has some natural sink to it. His sinker generates an extremely high number of swings & misses compared to other pitchers' sinkers, is an extreme flyball pitch compared to other pitchers' sinkers, has slight armside run and has slightly above average velo. His slow curve (take this with a grain of salt because he's only thrown 3 of them in 2016) is a real yakker that's separated from his other curveball due to its big drop and slow speed.