Rob Gronkowski retires from the NFL again - The Boston Globe
Retired Rob Gronkowski could make New England Patriots return in the future, says his agent, NFL News
Rob Gronkowski: 'I'm done with football'
Bucs Rumors: Tampa Has Change of Heart on Gronk's Future
Rob Gronkowski explains partying made him a better football player, revealed he could return to NFL
Rob Gronkowski insists: 'I wouldn't go back to football'
Browns safety says he had to hit Rob Gronkowski low - The Boston Globe
Patriots trade Rob Gronkowski to Buccaneers for 4th-round pick
Tom Brady Hints Rob Gronkowski Is Back to Old Self After Leaving Patriots
Four-time Super Bowl champion Rob Gronkowski retires from NFL for second time, NFL
Rob Gronkowski Talks Retirement, CBD, Losing Weight, NFL Changes
Rob Gronkowski says he would need a month of training to come out of retirement
Tom Brady has the power to bring Rob Gronkowski back from retirement, his agent says