Quote: The Devil's Advocate "If it turns out that he has jumped ship, isn't he contractually tied to Cas?.'"
Only to play Rugby League I suppose. If for arguments sake a player retired and then went to play football or cricket or just get a normal job nobody would say what about his contract so I don't see why he couldn't go to Rugby Union.
The problem he'd have possibly is if he (like many others before him) flop in RU and he comes back to RL. If it's within the time period his Cas contract still had to run then maybe that might be an issue I'm not sure?