Rob Gronkowski announces his retirement from the NFL
Tampa Bay Buccaneers tight end Rob Gronkowski says he will retire
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Rob Gronkowski announces retirement from NFL – WFTV
Rob Gronkowski retires again, but could make another comeback in
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Ex-Patriots tight end Rob Gronkowski announces NFL retirement
Rob Gronkowski announces his NFL retirement
Four-time Super Bowl champion Rob Gronkowski announces retirement
Who is Rob Gronkowski and why is he retiring?