Rob Gronkowski announces his second retirement from playing football
Rob Gronkowski on retiring from NFL at age 29: 'I didn't even want to negotiate' - Good Morning America
Former Tampa Bay Bucs Tight End Rob Gronkowski Announces his Retirement from Football - Bucs Nation
Gronk reaffirms he's 'done with football,' even if Tom Brady beckons
Patriots tight end Rob Gronkowski announces retirement
New England Patriots tight end Rob Gronkowski announces retirement, New England Patriots
Rob Gronkowski formally announces NFL retirement for second time - On3
Internet reacts to Rob Gronkowski's retirement announcement - ESPN
Rob Gronkowski Announces 2nd Retirement From NFL
Rob Gronkowski on excluding Patriots in second retirement post