Holding out hope that Rob Gronkowski's retirement is brief - The Boston Globe
Rob Gronkowski retirement: How the future HOF tight end's decision to hang up his cleats affects the Buccaneers
Rob Gronkowski retires (again) from NFL, revisited: Why former Buccaneers, Patriots tight end called it a career
Rob Gronkowski Says He's Likely Returning to Buccaneers
Bleacher Report - Rob Gronkowski says he's retiring from
Is Rob Gronkowski Returning To The NFL? It's Still Possible: Report
Gronk Retires, But His Agent Leaves an Opening - Sports Illustrated
Rob Gronkowski Retiring From Tampa Bay Bucs, NFL For 2nd Time
Agent -- Gronk retired, but people change minds - ESPN
Rob Gronkowski retires again, but could make another comeback in 2022 or 2023, agent says (report)
Four-time Super Bowl champion Rob Gronkowski retires from NFL for second time, NFL