Rob Gronkowski basks in perfect finale to NFL career with fourth Super Bowl - Mirror Online
Rob Gronkowski retirement: How the future HOF tight end's decision to hang up his cleats affects the Buccaneers
Tom Brady wins seventh Super Bowl, Rob Gronkowski is back: Neil Reynolds' Final Word on Super Bowl LV, NFL News
Rob Gronkowski retires: New England Patriots tight end steps away from NFL – The Denver Post
Rob Gronkowski on retiring from NFL at age 29: 'I didn't even want to negotiate' - Good Morning America
Rob Gronkowski Announces Retirement From NFL - Sactown Sports
Rob Gronkowski says the Patriots hold a special place in his heart
Former Wildcat and four-time Super Bowl champion Rob Gronkowski retires from the NFL again – The Daily Wildcat
Rob Gronkowski's retirement announcement draws suspicion, FIRST THINGS FIRST
Rob Gronkowski not retiring: 'I'm a free agent' - Sports Illustrated