Patriots Tight End Rob Gronkowski Announces Retirement
Rob Gronkowski retires: Patriots tight end is best in NFL history
Ranking the 5 greatest NFL tight ends of all time ft. Rob Gronkowski
Ten Stats That Prove Rob Gronkowski is the Greatest Tight End of All-Time
Patriots Suffer Big Loss: Gronkowski Will Retire - The New York Times
Rob Gronkowski announces his retirement
Why Now: What Got Rob Gronkowski Out of Retirement
Will Rob Gronkowski follow Tom Brady into retirement?
Rob Gronkowski retires as the greatest tight end of all time - Pats Pulpit