The huge red flag for me was that collision in the Vegas game that resulted in his latest concussion. It wasn't even that severe. Just an inadvertent mid-ice collision, with no suspension resulting. But he missed 30 games. Unfortunately it's the type of collision that a hockey player will face two or three times every game. And if he can't take that kind of hit and stay healthy, you really have to wonder if the best strategy is just to shut him down for the season and try again next fall.