Rob Gronkowski retires from the NFL
Tom Brady congratulates Rob Gronkowski on retirement
Rob Gronkowski announces his NFL retirement
Rob Gronkowski retiring from the NFL again
Rob Gronkowski Announces Retirement From The NFL – Hollywood Life
Rob Gronkowski on retiring from NFL at age 29: 'I didn't even want to negotiate' - Good Morning America
Former Patriots TE Rob Gronkowski announces retirement for 2nd time
Rob Gronkowski retires from NFL after 11 years with Patriots, Bucs
Rob Gronkowski Announces Retirement From NFL, Again
Why Rob Gronkowski says he 'isn't really retiring,' plus what he'd say if Tom Brady called - ABC News