NFL: Over and out as Gronkowski retires for second time
Rob Gronkowski retires (again) from NFL: Why we hope this one
Williamsville Native Gronkowski Announces Retirement
Patriots Tight End Rob Gronkowski Announces Retirement
Rob Gronkowski Announces Retirement From NFL, Again
Buccaneers' Rob Gronkowski clears up rumors about retiring (again
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Tampa Bay Buccaneers TE Rob Gronkowski retiring from NFL for
Rob Gronkowski, 4-Time Super Bowl Champ, Retires from NFL a Second
Rob Gronkowski retires for second time following decorated 11-year
Rob Gronkowski retires from the NFL again - The Boston Globe
Buccaneers tight end Rob Gronkowski retires for second time
Rob Gronkowski's agent thinks Patriots legend could return if Tom
Rob 'Gronk' Gronkowski announces retirement from Buccaneers, NFL
All-Pro tight end Rob Gronkowski retires again - The Japan Times