Rob Gronkowski, who underwent season-ending back surgery in December, says there is "no doubt" will be ready for the start of the 2017 season.

Gronkowski has had eight surgeries as a professional by age 27.

"I'm not really sure," the New England Patriots tight end said when asked of how long he plans to play. "I still love playing the game, and as of right now, I want to play as long as I can possibly play. My mindset is to keep on going."