puckhead
Custom User Title
Also what happens to an rfa if he isn't signed? Does he become a ufa after sitting a year? I know drafted players can sit a year to become ufas(see Umberger and more recently Schultz).
No. Mtl retains his RFA rights until he serves that year.
the guys returning to UFA you are talking about were all cases where the team that drafted him didn't sign him to a contract at all.