NFL: Tom Brady bids farewell to just retired friend Rob Gronkowski with heartfelt Instagram message
Tampa Bay Buccaneers TE Rob Gronkowski retiring from NFL for second time - ESPN
Rob Gronkowski retires again, but could make another comeback in 2022 or 2023, agent says (report)
End of the NFL for Gronk after retirement announcement
Rob Gronkowski: A year off from NFL was 'best decision ever'
Why did Gronk retire? Timeline of NFL retirement, comeback - Sports Illustrated
Rob Gronkowski Announces NFL Retirement for Second Time (UPDATE)
Rob Gronkowski wouldn't play football again even if Brady calls
Report: Rob Gronkowski “keeps on being asked” about NFL return
Sunday Night Football on NBC - Rob Gronkowski has announced his retirement from the NFL. More: bit.ly/3zT3L2J