FTFY.
At least that's how Rizzo would view him in a trade.
Rizzo can view him like that, but he hasn't been a decent starter since 2012.
The issue with Detwiler is that he's never pitched in the pen like this. I putting a lot of this on McCatty and LeCroy. Some on Stammen as well. They need to take him aside, get his head straight, and teach him how to prep in the pen. That might mean micromanaging him a little at first. Get him throwing earlier. Get him some bullpen sessions at 75-80% effort to keep him in the groove.
But it would be foolish to give up on him right now. He would be replaced with either Treinen (which means Treinen can't develop his secondary pitches) or Cedeno (who is a one inning reliever at best, and more likely a lefty specialist). So we either lose a lefty arm, making Blevins the only one, or we lost a long reliever, putting a lot on Stammen. Neither one of these is acceptable to me. Not yet anyway. Let's work with him, get him a routine, and see if we can fix him.
But the idea that we're going to get a guy who can play at the MLB level seems kind of silly.