Can't see his projections. Best guess is that his control will top out in the mid to high 80's, his vsL split in the low 70's and his vsR split in the mid 80's. Low DUR/STA along with the control and splits make him ideal to be a ML closer, though his P3-P5 will probably end up in the low 60's, which work against him as a closer.
Best way to develop him would be as a SuA in the minors to maximize his IP's (closers don't get enough IP's).