Rob 'Gronk' Gronkowski announces retirement from Buccaneers, NFL on Instagram
Rob Gronkowski Intends To Retire
Rob Gronkowski Announces 2nd Retirement From NFL
Rob Gronkowski retires, won't join Tom Brady for 3rd season
Rob Gronkowski Announces His Retirement - Sports Illustrated
Rob Gronkowski announces retirement
Rob Gronkowski talks about plans post-NFL retirement
Rob Gronkowski Announces NFL Retirement After 9 Seasons with Patriots, News, Scores, Highlights, Stats, and Rumors
Rob Gronkowski Announces Retirement From The NFL – Hollywood Life
Rob Gronkowski announces retirement from NFL – Boston Herald
Former Wildcat and four-time Super Bowl champion Rob Gronkowski retires from the NFL again – The Daily Wildcat
Rob Gronkowski Announces Retirement From The NFL – Hollywood Life