Wildcat product Rob Gronkowski announces retirement, again
Tampa Bay Buccaneers Tight End Rob Gronkowski Announces Retires, 11 NFL Seasons and 4 Super Bowls
Rob Gronkowski says there's a very good chance he returns to Buccaneers – NBC Sports Boston
Buccaneers bringing Gronk back was more important than you might think - Bucs Nation
Bucs' Rob Gronkowski retires, leaves door open for NFL return
Tampa Bay Buccaneers TE Rob Gronkowski announces retirement from NFL after 11 seasons
Rob Gronkowski returns from retirement to reunite with Tom Brady on Tampa Bay Buccaneers
10 fun facts about NFL tight end Rob Gronkowski
Rob Gronkowski wouldn't play football again even if Brady calls
What happened to Rob Gronkowski? He's a 'blocking tight end' with the Buccaneers