Who is Rob Gronkowski and why is he retiring?
NFL world reacts to Rob Gronkowski retiring for a second time
NY Jets nemesis Rob Gronkowski is calling it a career once more
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Rob Gronkowski Announces 2nd Retirement From NFL
Former Patriots great Rob Gronkowski retires for a second time
Rob Gronkowski retires for second time after 11 seasons in NFL - The Washington Post
Rob Gronkowski announces his retirement from NFL for second time
Rob Gronkowski retires (again) from NFL, revisited: Why former Buccaneers, Patriots tight end called it a career
3 teams Rob Gronkowski should join if he comes out of retirement