So often with prospects, you see the "Drew Pomeranz" analysis: this guy has two big league pitches and if he can add a third (or fourth) one he could be a solid big league starting pitcher, but if not his future is probably in the bullpen.
It’s hard to sustain success in the big leagues as a starting pitcher with just two pitches, something Pomeranz himself demonstrated early in his career. Only with the development of his changeup to complement the fastball/spike curve duo has the former A’s lefty emerged as a successful starting pitcher.
So it’s not surprising that Kendall Graveman’s emergence as a prospect coincided with the addition of a cutter.