In the two leagues I have him, it pretty much killed him (and me). One league has a restrictive innings cap so I don't think I could take on another SP when I have CC, Shields, Lester, Meche, and Cook going well. The other is a H2H points league and by the time he comes back it will be the playoffs and I will be out of it.
I dont think I have ever heard of a player having a successful stint as a closer and then being demoted. I understand the reason for it, but it is just strange.