4-time champion, All-Pro tight end Rob Gronkowski announces retirement
Gronk wants to return to Bucs in 2021 - Bucs Nation
Rob 'Gronk' Gronkowski announces retirement from Buccaneers, NFL on Instagram
Rob Gronkowski injury update: Bucs TE out for Week 4 vs. Patriots, could miss few weeks with multiple fractured ribs - DraftKings Network
Rob Gronkowski plans to return to the Buccaneers in 2021, tight end set to be unrestricted free agent
Tom Brady Wants to Do Everything in His Power to Bring Back Rob Gronkowski - EssentiallySports
Rob Gronkowski Announces 2nd Retirement From NFL
Tampa Bay Buccaneers 2021 Free Agent Profile: TE Rob Gronkowski - Tampa Bay Buccaneers, BucsGameday
Rob Gronkowski retires, won't join Tom Brady for 3rd season in Tampa Bay
Rob Gronkowski could land with Buffalo Bills if he plays in 2022, per report
Bills reportedly want Rob Gronkowski to end his career back home in Buffalo