A #5 starter is a #5 starter. A dumpster dive would be by no means ideal but given how good the rest of the rotation is I don't think it would kill us. That said, I would much prefer they don't go for a Stammen/Duke/Saunders type. If it were me I would re-sign Edwin Jackson and know that Stammen could be good for a spot start if need be. I would certainly keep Duke for organizational depth though. He's fine as a #7 pitcher. That tier of pitchers would really better be used as minor league depth.
Well, by replacing Jackson with Detwiler, you're also weakening your #4 spot in the rotation... so not only do you have a worse #5, you've also weakened your #4 slot, as well.
