There are dozen of former players, some big names with their short term memory shot. I can't imagine a 250 lbs man running full speed with the helmet as the tip of missile colliding with me with my helmet on. Crazy stuff. But all the players do it voluntary and have no right to cry about after their careers are over. I do love watching teams such as NE and Packers. But would I push my son to play? Nah, don't think so.