Scouting grades 20–80
50Fastball
55Slider
60Curveball
40Changeup
55Control
Peterson has been another notable riser this spring due to jumps in velocity, command and overall stuff. He's one of the more intruiging mid-major arms in this class.
Peterson is an ultra-fluid and athletic mover. He rides his high leg kick beautifully down the mound, generating solid extension. It's a starters look, and the operation as a whole has become more in-sync over time. Peterson is now reaching up into the mid-90s with his fastball that he throws with some carry coming from a low three quarters slot. While the pitch has favorable shape and release traits, he can at times struggle to garner whiffs with the offering. Peterson's best offering is a low-80s breaking ball with some sharp bite and spin rates that at times will eclipse 3,000 rpms. It's a plus breaker. He'll also flash an occasional changeup pretty much exclusively to lefties.
