Yeah, doesn't Carter have a NTC clause now? I'd doubt he'd waive it to come back here.
Edit: Apparently not. Although I don't understand why considering we traded him before his extension/clause kicked in.
I also think he had the clause about to kick in, however (per CBA):
If the Player is Traded or claimed on Waivers prior to the no-Trade or no-move clause taking effect, the clause does not bind the acquiring Club. An acquiring Club may agree to continue to be bound by the no-Trade or no-move clause...