Joe Namath, one of the most charismatic players in NFL history and one of the game's greatest quarterbacks, said today that if he'd known then what he knows now about concussions, he would never have played football. Namath, who has recently undergone treatment for brain injuries, was asked in an interview with Tiffany Kenney of ABC's West Palm Beach, Florida, affiliate WPBF-TV whether would still play the game, given all he has learned about the effects of concussions. "No," he said. "I hate to say that because if I had a child who wanted to play I'd let them play...