Rob Gronkowski retires with 3 Super Bowl rings. What's next for Patriots?
Former Patriots great Rob Gronkowski retires for a second time
Valley News - Gronk's party is just getting started
Rob Gronkowski Announces Retirement
Rob Gronkowski says the Patriots hold a special place in his heart
New England Patriots should be retiring Rob Gronkowski's No. 87 not giving it to long shot rookies
Tom Brady retires from NFL after winning seven super Bowl rings
Rob Gronkowski retired from the NFL? Few people are taking it seriously - The Boston Globe
Gronk says he's healthy and fire burns to play with Brady
3 Possibilities for Rob Gronkowski's 'Big Announcement'
Rob Gronkowski set to retire from football after nine seasons with the Patriots