He's been really bad, I know. If his stuff was gone, I would completely agree. But the stuff still looks like it's there. He's just lost his control and probably his confidence.
He throws harder than Hoby, feels like more strikes too. It looks like batters have a hard time squaring up on him.
Edit: I just checked. Hoby has an ERA of 0.00 after pitching 7 innings for the Rangers.