This is a tough one, It is made difficult because he's a young guy and other guy's have had severe concussions, recovered and played well,fc mentioned p bergeron, but what about simon gagne, he had a stretch where he would get loopy if he looked at the ceiling too quickly, (exaggeraton) 4 years later he's still in the league. I would not want him to jepardize the rest of his life for sport, but I and I think the game would miss his talent and drive. it would be great if more guys would be like Messier and put some $ into research and equipment development so lessen these injuries, maybe utimately that will be Sid's contribution to the game. I wouldn't care if he lit us up as long as we win the series. If I were him i'd try to come back one more time, but i listen really closely to my body, if i were to experience symptoms from a stupid collision like the one i had with kunitz again i'd walk away. i don't think we've seen the last days fo 87 playing hockey at a high level.