Now retired from the NFL for seven years, former quarterback Brett Favre has become more outspoken about the dangerous of playing professional football.

Favre is the NFL's ironman. He played for 20 seasons and set the record for the most consecutive starts with 297. The Hall of Famer played through breaks, bumps, and cuts, and has often been asked how to make the sport safer.

"Well, I think first of all, how do you make the game safer? You don't play. Is that gonna happen?" Favre said to CNN's Christiane Amanpour.

He has recently said he'd prefer his grandsons play golf over football. He's been involved with a documentary on concussions as the executive producer.

"The contacts are going to be much more violent. And so concussions will continue to be a serious issue," Favre said. "There's only so much that helmets can do. So we'll look at it from a treatment standpoint. And the only other option is not to play."

Reported concussions in the NFL reached a record high of 281 in 2017.