Jake Arrieta has thrown 24,566 pitches that have been tracked by the PITCHf/x system between 2008 and 2019, including pitches thrown in the MLB Regular Season, the MLB Postseason and Spring Training. In 2019, he has relied primarily on his Sinker (93mph), also mixing in a Change (88mph), Curve (81mph) and Slider (90mph). He also rarely throws a Fourseam Fastball (93mph).
Basic description of 2019 pitches compared to other RHP:
His sinker has slight armside run. His change dives down out of the zone, is much firmer than usual, results in many more groundballs compared to other pitchers' changeups and has slight armside fade. His curve generates fewer whiffs/swing compared to other pitchers' curves, has a sharp downward bite, is slightly harder than usual and has slight glove-side movement. His slider is thrown extremely hard, has much less depth than expected, generates fewer whiffs/swing compared to other pitchers' sliders and results in more flyballs compared to other pitchers' sliders. His fourseam fastball generates an extremely high number of swings & misses compared to other pitchers' fourseamers, is an extreme flyball pitch compared to other pitchers' fourseamers, has some natural sinking action and has essentially average velo.