Although he has not thrown an MLB pitch in 2018, Tanner Scheppers threw 3,531 pitches that were tracked by the PITCHf/x system between 2009 and 2017, including pitches thrown in the MLB Regular Season, Spring Training and Fall/Winter Ball. In 2017, he relied primarily on his Sinker (94mph) and Slider (82mph), also mixing in a Fourseam Fastball (95mph). He also rarely threw a Change (91mph).
Basic description of 2017 pitches compared to other RHP:
His sinker has slight armside run and has slightly above average velo. His slider has exceptional depth, results in more flyballs compared to other pitchers' sliders and has short glove-side cut. His fourseam fastball is an extreme flyball pitch compared to other pitchers' fourseamers, generates more whiffs/swing compared to other pitchers' fourseamers, has slight armside run and has slightly above average velo. His change (take this with a grain of salt because he's only thrown 4 of them in 2017) is thrown extremely hard, has an obvious armside fade, results in more flyballs compared to other pitchers' changeups and has some natural sink to it.