Rob Gronkowski announces his retirement
Gronkowski announces retirement from NFL
Rob Gronkowski retires from the NFL again - The Boston Globe
Ex-Patriots Star Gronk Announces Retirement From Football: 'I Gave It Everything I Had'
New England Patriots tight end Rob Gronkowski announces retirement, New England Patriots
Patriots tight end Rob Gronkowski announces retirement
Rob Gronkowski announces retirement from NFL – Boston Herald
Patriots TE Rob Gronkowski announces retirement
Gronk Announces Retirement After 9 Year Career, 3rd Super Bowl Win
Rob Gronkowski will be back with the Patriots in 2018, as expected
Rob Gronkowski retires as the owner of 15 NFL records - Pats Pulpit