Yesavage pitched 94 innings in college last year and is at 62 so far this season. I guess if you add on teh typical 30-ish innings teams usually increase workloads by per season hed be looking at a cap this season at around 120, so basically about halfway there already.
I could definitely see a debut this season but i think it would be out of the pen, maybe getting 2-3 innings at time to cap off the innings limit after NH or Buffalo's season is over depending on where he is at the time.
Injuries, of course, could change that.