Former Patriots great Rob Gronkowski retires for a second time
Rob Gronkowski Intends To Retire
Buccaneers not ruling out Rob Gronkowski's return despite Tom Brady retiring
BREAKING: Rob Gronkowski Retires from Football
Gronk's impact on Bucs locker room equal to Brady's, GM says
Rob Gronkowski, 4-Time Super Bowl Champ, Retires from NFL a Second Time
Rob Gronkowski announces retirement, can Tom Brady convince Gronk to return?, UNDISPUTED
Rob Gronkowski Retiring From Tampa Bay Bucs, NFL For 2nd Time
Rob Gronkowski won't return to the NFL even if Tom Brady asks him to - AS USA