Buccaneers' Rob Gronkowski announces retirement from NFL
Rob Gronkowski Retires, TE Gronk Will Not Rejoin Tom Brady and Bucs
Why retired NFL star Rob Gronkowski never spent his NFL salary
New book reveals Tom Brady led Buccaneers' recruitment of Rob Gronkowski
Tampa Bay Buccaneers Tight End Rob Gronkowski Announces Retires, 11 NFL Seasons and 4 Super Bowls
Tom Brady returning to Buccaneers 6 weeks after retiring
Tom Brady retires after 22 seasons, 7 Super Bowl titles - The Columbian
Rob Gronkowski to host official retirement party at Mohegan Sun