In 1963, John Mackey joined the Colts and by 1966, had revolutionized the position of tight end in the NFL. Twice Mackey compiled season averages of more than 20 yards a catch, and his 10-year career average of 15.8 is considered remarkable for a tight end. John Mackey has hand autographed this Baltimore Colts NFL Licensed 8x10 Photo with HOF 1992 inscription. New, Custom Black Frame with White Mat. Certificate of Authenticity from Athlon Sports.