Detwiler and Gorzelanny would be two more options if anyone got hurt.
I don't trust Gorzelanny at all, and I think it's likely Peackock, Milone, and Detwiler all see significant time in the rotation as it stands- at a minimum I expect them to be starting at the end of the year when Strassburg and Wang are done, besides, I wholly buy into davy's notion of a bullpen having decent long men