Is there any likelihood of Rob Gronkowski unretiring at some point? - Quora
Buccaneers' Mike Evans Wants Starting Quarterback Answer 'Soon' - Tampa Bay Buccaneers, BucsGameday
Rob Gronkowski contacted Bucs last month about possible return
Tampa Bay Buccaneers Tight End Rob Gronkowski Announces Retires, 11 NFL Seasons and 4 Super Bowls
Tampa Bay Buccaneers Tight End Rob Gronkowski Announces Retires, 11 NFL Seasons and 4 Super Bowls
Rob Gronkowski retires (again) from NFL, revisited: Why former Buccaneers, Patriots tight end called it a career
Stunner: Gronk unretires and reunites with Brady in Tampa
With trade to Buccaneers, Rob Gronkowski gets to return to the NFL on his own terms - The Boston Globe
Rob Gronkowski would only play for Buccaneers if he decides to return for another season
3 Former Patriots That Could Unretire and Play With Tom Brady and Bucs