Rob Gronkowski retires: Bucs TE to end his Hall of Fame NFL career
Rob Gronkowski Announces His Retirement - video Dailymotion
Four-time Super Bowl champion Rob Gronkowski retires from NFL for second time, NFL
3 teams Rob Gronkowski should join if he comes out of retirement
Rob Gronkowski makes hilarious Tom Brady retirement joke - On3
Why Now: What Got Rob Gronkowski Out of Retirement
A Key to Brady's Super Bowl Success? Gronkowski, of Course - The New York Times
Patriots tight end Rob Gronkowski announces retirement
Will Rob Gronkowski Come Out of Retirement for Tom Brady?
Rob Gronkowski explains why he came out of retirement and how he ended up with the Buccaneers
Rob Gronkowski retires (again) from NFL: Why we hope this one doesn't stick either
Rob Gronkowski Discussed Second Unretirement With Buccaneers
How Tampa Bay got Rob Gronkowski back in the NFL - ABC News