There has been a lot of talk about how long Tom Brady will continue to play football, but some of the NFL's younger quarterbacks have an eye on longevity as well.

Derek Carr, 30, believes he has plenty more seasons left in him.

"I feel like I can play another 15 years, without a doubt," Carr said. "Nothing's hurting. It's the middle of camp, and I feel great. I feel strong, I feel fast, I feel explosive. And I think it's just the way we train now."