Career
Starter: 3.22, 603 OPS
Reliever: 2.68, 570 OPS
His career numbers are pretty strong.
The known issue of him as a starter is:
1st time through the order as starter: 0.96, 504 OPS
2nd time through the order as starter: 4.12, 642 OPS
3rd time through the order as starter: 14.21, 1016 OPS (only 6.1 innings)
His issue is he really has two main pitches and a third pitch that is fringy. If he truly developed the third pitch, maybe he could work longer into a game.