He has a concussion history, and has another (seemingly) serious concussion after the last fight.
The team isn't releasing any info about his health, or the severity, but he hasn't played since the injury.
His career could be in jeopardy. Let's presume he comes back; barring a miracle, I think you can expect him to fight very little in the future.
He only knows how to fight wide open; if he's not already there, he's one big punch away from a guy that retires young due to concussion issues that will affect his life for a long time to come.
His game had improved dramatically before the injury, at both ends of the ice. He could still make it as a player (especially now that there is so little fighting in the NHL, and the top guys aren't super scary (with a few obvious exceptions).
McGrattan would kill Pedan (even without the concussion history). Maybe that would be different if he were to put in 20-30 pounds, and with more experience fighting top end NHL tough guys, but pre KO loss, he wasn't in McGrattans league.