Rob Gronkowski retires: Bucs TE to end his Hall of Fame NFL career
Tampa Bay Buccaneers GM Jason Licht Discusses TE Rob Gronkowski's Future - Tampa Bay Buccaneers, BucsGameday
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Tampa Bay Buccaneers TE Rob Gronkowski retiring from NFL for second time - ESPN
Tom Brady is returning to Tampa to play 23rd season in NFL - WHYY
Rob Gronkowski announces retirement - NBC Sports
Rob Gronkowski retires for second time after 11-year career
Tampa Bay Buccaneers TE Rob Gronkowski announces retirement from NFL after 11 seasons