John Eldon Zook (September 24, 1947 – June 6, 2020) was an American professional football player who was a defensive end for 12 seasons in the National Football League (NFL).

Zook played college football for the University of Kansas.

[1][2] He was a three-year letterman, was picked twice for all-conference honors, anchoring one of the top defensive units ever taking the field at KU.

He was an honorable mention All-American in 1967 and was a consensus All-America honors as the Jayhawks' defensive standout on the 1968 Orange Bowl-bound team, the year KU was named No.

Zook played 144 games in the NFL and was a Second-team All-Pro selection in 1973.