QB legend Favre on a concussion crusade

Hall of Fame quarterback Brett Favre believes he has suffered "hundreds, probably thousands" of concussions over his football life and said if he had a son, he would try to convince him not to play the sport.

The former Green Bay Packers icon told NBC News' Megyn Kelly on Thursday's Today show that while he was only diagnosed with three or four confirmed concussions, he has had the sensation of "getting dinged" on countless occasions.

"When you have ringing of the ears, seeing stars, that is a concussion," Favre said. "If that is a concussion, I've had hundreds, probably thousands, throughout my career, which is frightening.