4-time champion, All-Pro tight end Rob Gronkowski announces retirement
Rob Gronkowski formally announces NFL retirement for second time - On3
Fantasy Football: Rob Gronkowski's retirement announcement leaves big questions for Buccaneers (for now)
Nothing wrong with the Bucs that Rob Gronkowski can't fix
Former Wildcat and four-time Super Bowl champion Rob Gronkowski retires from the NFL again – The Daily Wildcat
Rob Gronkowski insists he's 'done with football' even if Tom Brady calls
Rob Gronkowski retires as the greatest tight end of all time - Pats Pulpit
Bucs Tight End Rob Gronkowski Gives Timeline for Retirement Decision - Bucs Nation
NFL world reacts to Rob Gronkowski retiring for a second time