Internet reacts to Rob Gronkowski's retirement announcement - ESPN
Rob Gronkowski retires: Measuring Gronk's greatness as star TE hangs up his cleats after 11-year NFL career
Rob Gronkowski on retiring from NFL at age 29: 'I didn't even want to negotiate' - Good Morning America
Rob Gronkowski retires: Top on-field, off-field moments of the tight end's legendary NFL career
Rob Gronkowski Announces 2nd Retirement From NFL
Rob Gronkowski Announces Retirement From The NFL – Hollywood Life
Rob Gronkowski Announces NFL Retirement After 9 Seasons with Patriots, News, Scores, Highlights, Stats, and Rumors
Rob Gronkowski Announces He's Retiring, 'I Gave It Everything I Had'
Former Wildcat and four-time Super Bowl champion Rob Gronkowski retires from the NFL again – The Daily Wildcat
Rob Gronkowski Announces Retirement
Rob Gronkowski announces retirement from NFL – Boston Herald