Justin Grimm has thrown 4,300 pitches that have been tracked by the PITCHf/x system between 2012 and 2016, including pitches thrown in the MLB Regular Season, the MLB Postseason and Spring Training. In 2016, he has relied primarily on his Fourseam Fastball (96mph) and Curve (84mph). He also rarely throws a Slider (88mph).
Basic description of 2016 pitches compared to other RHP:
His fourseam fastball has good "rising" action, has well above average velo and has slightly less natural movement than typical. His curve is thrown extremely hard, generates an extremely high number of swings & misses compared to other pitchers' curves and has slight glove-side movement. His slider (take this with a grain of salt because he's only thrown 1 of them in 2016) is basically never swung at and missed compared to other pitchers' sliders, has exceptional depth, is an extreme flyball pitch compared to other pitchers' sliders, has short glove-side cut and is much harder than usual.