Rob Gronkowski Announces Retirement From NFL - Sactown Sports
Rob Gronkowski Announces 2nd Retirement From NFL
Rob Gronkowski announces second retirement from football
Former Patriots TE Rob Gronkowski announces retirement for 2nd time
Patriots TE Rob Gronkowski announces retirement after nine seasons
Patriots Tight End Rob Gronkowski Announces His Retirement On Instagram
Patriots' Rob Gronkowski announces his retirement following nine NFL seasons - Los Angeles Times
Rob Gronkowski retires: New England Patriots tight end steps away from NFL – The Denver Post
Rob Gronkowski Announces Retirement From NFL, Again - E! Online
Patriots tight end Rob Gronkowski announces retirement
Tom Brady: Rob Gronkowski 'shocked' by former team-mate's retirement aged 45, saying he could still play until he is 50, NFL News