PFF Record Book: Tight end signature stats
I think it's pretty clear who the best tight end we've seen in the
Harvard: The Gronk School of Tight Ends - WSJ
Rob Gronkowski retires again, greatest tight end ever?
Rob Gronkowski retires: Patriots tight end is best in NFL history
San Francisco 49ers: Comparing George Kittle and Rob Gronkowski's
Rob Gronkowski made NFL history on Sunday night
Gronk Was The Most Efficient Receiver We've Seen
Rob Gronkowski retires (again) from NFL, revisited: Why former
Has Travis Kelce surpassed Rob Gronkowski as the best tight end in
Ranking the 5 greatest NFL tight ends of all time ft. Rob Gronkowski
New England Patriots tight end Rob Gronkowski announces retirement
Patriots' Rob Gronkowski announces his retirement following nine