Say we trade some of our big prospects for those guys. Hoffman, Sanchez and many others. Like others have said, there is still a good chance we finish 4th. And then we have no prospects. We're in a very untenable situation. I think the least of all the evils is to call up Norris, get Sanchez healthy and call him up, and go with those guys (almost) no matter what. I would call up Castro as soon as I can, too. For the bullpen.
MB will (chances are) have a crappy second half. He wears down and he gets lit up. I would trade him, and then call up Boyd and keep him in that rotation the rest of the season. See what we have.
Lastly, I would consider DFA Dickey. I'm sure he can't be traded.
So, for the rest of the season, I'd ride with the young guns...and a few stragglers.
Hutchinson
Sanchez
Boyd
Estrada
Norris