New York Mets
Although he has not thrown an MLB pitch in 2017, Robert Gsellman threw 713 pitches that were tracked by the PITCHf/x system in 2016, all of them occuring in the MLB Regular Season. In 2016, he relied primarily on his Sinker (94mph), also mixing in a Fourseam Fastball (95mph), Cutter (89mph), Curve (82mph) and Change (87mph). He also rarely threw a Slider (88mph).
Basic description of 2016 pitches compared to other RHP:
His sinker generates an extremely high number of swings & misses compared to other pitchers' sinkers, generates a very high amount of groundballs compared to other pitchers' sinkers and has well above average velo. His fourseam fastball has slightly above average velo. His cutter generates an extremely high number of swings & misses compared to other pitchers' cutters, has heavy sink and is a real worm killer that generates an extreme number of groundballs compared to other pitchers' cutters. His curve is slightly harder than usual. His change is basically never swung at and missed compared to other pitchers' changeups, is much firmer than usual and results in somewhat more flyballs compared to other pitchers' changeups. His slider (take this with a grain of salt because he's only thrown 18 of them in 2016) is thrown extremely hard, is an extreme flyball pitch compared to other pitchers' sliders and has primarily 12-6 movement.