Well, the interesting thing is all of a sudden his concussion may never have been that bad now.
His main injury at the winter classic may have been just the cracked neck, or soft tissue damage - or whatver.
But the persistant ‘concussion’ symtoms could just be caused by never allowing that neck to heal - because he may not have given it a proper chance. Maybe he should have been wearing a neck brace for a few months - not doing light workouts or other exercises the concussion experts cleared.