Cash his career as long as possible? But first thing first: get a new trainer. He needs to star building up again. Get some easy wins, and gradually move up, while staying active and getting better.
Because he is risking his health. He has had 3-4 hand injuries, paralyzed vocal cords, and the massive shoulder injury. Now we can add a concussion. Hang em up with your head held high and your health mostly intact. Everyone knows things might have been different.
To the hair dressers hopefully the bloke looks a total tool .a fight against brieadas would be interesting .