Buzz Nutter, the center for John Unitas on NFL championship teams with the Baltimore Colts in 1958 and 1959, has died. He was 77. He died Saturday of heart failure at Civista Medical Center, the Raymond Funeral Home in La Plata, Md., said Monday. Nutter was a 12th-round draft choice of the Washington Redskins in 1953 but failed to make the team. A year later, the Colts signed him.