Rob Gronkowski retires: Patriots tight end is best in NFL history
Gronk in fine form this season
Rob Gronkowski's Retirement, Training Camp Dates & More
NFL notes: Patriots' Rob Gronkowski proud of his versatility
Has Travis Kelce surpassed Rob Gronkowski as the best tight end in the NFL? Some experts think so.
Rob Gronkowski: The Inspiring Story of One of Football's Greatest Tight Ends (Football Biography Books) - Kindle edition by Geoffreys, Clayton.
Rob Gronkowski: The Inspiring Story of One of Football's Greatest Tight Ends (Football Biography Books) See more
Judge & Jury: Which Tight End Do You Consider NFL's Greatest Ever? - Talk Of Fame
Rob Gronkowski played the goofball but few can doubt his greatness, New England Patriots
Rob Gronkowski retires: Top on-field, off-field moments of the tight end's legendary NFL career
The Only Coach Who Can Stop Gronk: His Own - WSJ
Patriots Suffer Big Loss: Gronkowski Will Retire - The New York Times