I've been following since I heard about his spin rates and velocity two years ago. I kind of dropped him off after last season at Bowie when he just really didn't command anything and lefties lit him up for a .287/.415/.475/.890. It appears to me that he's ditched the slider with the bigger downward break and gone to this cutter with the quick late break.
All I know is that he was impressive the couple times I watched him this year and the improvements are seen in the stats with the lack of walks and high K rate.
How good is that spin on the cutter? Only 7 major league pitchers have averages above his 2677 spin rate. They include Corbin Burnes, Dylan Cease, Sonny Gray, and JP France.
It appears to me that he throw two different type of cutters, with one being slower and having slider movement.
He threw 12 cutters:
8 had 0-7 inches of Horizontal movement and 23-30 Vertical movement
4 had 12-19 inches of Horizontal movement and 30-33 Vertical movement
The highest average horizontal movement in the MLB is by 7.3 inches by Chris Flexen (so the 12-19 inches of horizontal are off the charts by cutter standards)
Vertical movement is supposed to be a lower number like a fastball so the best is 14.3 by David Robertson.
It's hard to even find a comp for Strowd's cutter velocity and vertical wise.
When I look at major league movement on cutters and sliders, it appears to me that he's throwing a sorta hybrid cutter/slider which may be given batters fits because they are not use to seeing that.
Either way, he's become real interesting.