Although he has not thrown an MLB pitch in 2017, Stephen Strasburg threw 14,772 pitches that were tracked by the PITCHf/x system between 2009 and 2016, including pitches thrown in the MLB Regular Season, the MLB Postseason and Fall/Winter Ball. In 2016, he relied primarily on his Fourseam Fastball (96mph), also mixing in a Slider (90mph), Change (90mph) and Curve (82mph). He also rarely threw a Sinker
Basic description of 2016 pitches compared to other RHP:
His fourseam fastball has well above average velo and has slight armside run. His slider is thrown extremely hard, generates a very high amount of groundballs compared to other pitchers' sliders and has much less depth than expected. His change is thrown extremely hard, generates a high number of swings & misses compared to other pitchers' changeups, results in somewhat more groundballs compared to other pitchers' changeups, has slight armside fade and has some natural sink to it. His curve is a real worm killer that generates an extreme number of groundballs compared to other pitchers' curves, is much harder than usual and has slight glove-side movement. His sinker (take this with a grain of salt because he's only thrown 6 of them in 2016) generates an extremely high number of swings & misses compared to other pitchers' sinkers, is an extreme flyball pitch compared to other pitchers' sinkers and has well above average velo.