Sweet, now I move up a ranking. j/k
In all seriousness, depending on the seriousness of the injury, you'd most likely be able to drop him and pick up another starter. I'll talk to Dipre about it, but in my opinion since Wainwright was such an early pick, and since he costs such little salary, I think that you should be able to draft a FA pitcher at ANY salary and not have it count towards the cap. I'm just throwing that idea out there, but we'll see what Dipre thinks. It also depends on how much under the cap you were in the first place.