Rob Gronkowski closes the door on possible NFL comeback, says he's 'happily retired'
Rob Gronkowski announces retirement from NFL – Boston Herald
Former Patriot Rob Gronkowski Retires From NFL
Rob Gronkowski on retiring from NFL at age 29: 'I didn't even want to negotiate' - Good Morning America
Rob Gronkowski retires for second time after decorated 11-year NFL career - Mirror Online
Five Reasons Why Rob Gronkowski Might Be the Greatest Tight End in NFL History
Rob Gronkowski retires, won't join Tom Brady for 3rd season in Tampa Bay
Bucs TE Rob Gronkowski retires from NFL for second time
Four-time Super Bowl champion Rob Gronkowski announces retirement after 11 seasons with Patriots, Buccaneers
Rob Gronkowski retires for second time after 11 seasons in NFL - The Washington Post
Rob Gronkowski Not Thinking About Retirement, Focused On Beating Jets - CBS Boston
Patriots tight end Rob Gronkowski noncommittal on returning in 2018 - Pats Pulpit
Rob Gronkowski on retiring from NFL at age 29: 'I didn't even want to negotiate' - Good Morning America
Rob Gronkowski retires: His impact and legacy - Sports Illustrated
Rob Gronkowski announces retirement from NFL, Trending