Tampa Bay Buccaneers TE Rob Gronkowski retiring from NFL for second time - ESPN
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Rob Gronkowski retires as arguably the greatest TE in NFL history, Rob Gronkowski, National Football League, tight end
Where is Rob Gronkowski? Latest news, rumors about whether retired TE will return to Buccaneers
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Tampa Bay Buccaneers TE Rob Gronkowski retiring from NFL for second time - ESPN
Rob Gronkowski to Reunite With Tom Brady in Tampa Bay - The New York Times
See you in Canton Rob Gronkowski, an all-time great, NFL News, Rankings and Statistics
With Rob Gronkowski retired, 49ers' George Kittle climbs ranks of NFL's top tight ends