Patriots tight end Rob Gronkowski announces retirement
NFL: New England Patriots tight end Rob Gronkowski suffers torn ACL and MCL, NFL News
Patriots' Rob Gronkowski takes part in first practice
Tom Brady: BFF Gronk says QB would sign 50-year contract if he could
New England Patriots Tight End Rob Gronkowski Announces Retirement - The Ringer
Patriots' Rob Gronkowski likely to miss rest of season after back surgery, New England Patriots
Patriots tight end Rob Gronkowski announces he's retiring
Patriots list Rob Gronkowski with a concussion - The Boston Globe
How Tom Brady, Bill Belichick, Robert Kraft, and others are reacting to Rob Gronkowski's retirement