Sean Doolittle has thrown 5,949 pitches that have been tracked by the PITCHf/x system between 2012 and 2019, including pitches thrown in the MLB Regular Season, the MLB Postseason and Spring Training. In 2019, he has relied primarily on his Fourseam Fastball (94mph). He also rarely throws a Change (84mph) and Slider (81mph).
Basic description of 2019 pitches compared to other LHP:
His fourseam fastball generates a high number of swings & misses compared to other pitchers' fourseamers, has much less armside movement than typical, has good "rising" action, has well above average velo and results in somewhat more flyballs compared to other pitchers' fourseamers. His change is an extreme flyball pitch compared to other pitchers' changeups, has a lot of backspin and is slightly firmer than usual. His slider has short glove-side cut and results in somewhat more flyballs compared to other pitchers' sliders.