Former Wildcat and four-time Super Bowl champion Rob Gronkowski retires from the NFL again – The Daily Wildcat
Gronkowski: Retirement could end in three months or three years - Los Angeles Times
Rob Gronkowski retires: Measuring Gronk's greatness as star TE hangs up his cleats after 11-year NFL career
Four-time Super Bowl champion Rob Gronkowski announces retirement after 11 seasons with Patriots, Buccaneers
Gronk reached out to Bucs about potential return, opted to stay retired
Rob Gronkowski announces retirement from NFL – Boston Herald
Rob Gronkowski announces retirement from NFL – WSOC TV
Former Wildcat and four-time Super Bowl champion Rob Gronkowski retires from the NFL again – The Daily Wildcat
Four-time Super Bowl champion Rob Gronkowski announces retirement after 11 seasons with Patriots, Buccaneers
Four-time Super Bowl champion Rob Gronkowski announces retirement after 11 seasons with Patriots, Buccaneers
Rob Gronkowski fulfills goal on football field in retirement
Rob Gronkowski says there is only one NFL coach who could lure him out of retirement - Mirror Online