Rob Gronkowski retires after 11 seasons, 4 Super Bowl championships
Rob Gronkowski - Tight end announces his retirement - Fantasy Index
Rob Gronkowski announces retirement again
After playoff dud, Brady faces choice of whether to continue
Rob Gronkowski: Twitter reacts to Gronk's retirement
See Tom Brady's Funny Response to Rob Gronkowski's Retirement
Rob Gronkowski retires with 3 Super Bowl rings. What's next for
Rob Gronkowski insists he's 'done with football' even if Tom Brady
Rob Gronkowski Announces Retirement - Faceoff Sports Network
Rob Gronkowski won't return to the NFL even if Tom Brady asks him
Pending a physical, Gronkowski set to reunite with Brady in Tampa
Bucs Tight End Rob Gronkowski Gives Timeline for Retirement