I'm sure now that the dangers of concussions are known, all current NFL players will retire and find a safer line of work. After all, nobody, knowing the risk, would willingly risk their health for millions of dollars, right? /sarc
OTOH, it is also true that going back 30-40 years..we really didn't understand the danger of concussions.."Getting your bell run" and then going right back in the game..showed how tough you were...and don't forget..many can rememebr when during summer practices..coaches NFL, College, and HS wouldn't allow the players to drink water...now, they FORCE them to drink..Bear Bryant, when he coached Texas A&M..was famous for NO WATER...it's amazing that more didn't die of dehydration/oberheating