Rob Gronkowski's retirement draws sweet message from Tom Brady
Rob Gronkowski retires: Bucs TE to end his Hall of Fame NFL career
Tampa Bay Buccaneers TE Rob Gronkowski retiring from NFL for second time - ESPN
Tom Brady: Rob Gronkowski 'shocked' by former team-mate's retirement aged 45, saying he could still play until he is 50, NFL News
Rob Gronkowski Coming Out Of Retirement Hinges On Tom Brady's Plans
Rob Gronkowski retires, won't join Tom Brady for 3rd season
Buccaneers' Rob Gronkowski Reflects on Winning Super Bowl 2021
Gronk reached out to Bucs about potential return, opted to stay retired
Rob Gronkowski announces his retirement from NFL for second time
Why did Gronk retire? Timeline of NFL retirement, comeback - Sports Illustrated