|Born:||September 24, 1947|
Garden City, Kansas
|NFL draft||1969 / Round: 4 / Pick: 99|
(By the Los Angeles Rams)
|1976–1979||St. Louis Cardinals|
|Career highlights and awards|
|Pro Bowls||1 (1973)|
Second-team All-Pro (1973)
Second-team All-NFC (1972, 1973)
John Eldon Zook (born September 24, 1947 in Garden City, Kansas) is a former NFL player. He attended and played high school football at Larned, Kansas. He was a defensive end who played 12 seasons in the National Football League for the St. Louis Cardinals and the Atlanta Falcons. Zook played college football for the University of Kansas.
Zook 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. 6 by the Associated Press. Zook had 202 total tackles during his career, putting him at No. 4 on KU's all-time defensive line list. KU Coach Pepper Rodgers said Zook "never played but full speed from snap one to snap hundred. He was the most full-speed player on every snap that you could imagine."  He was also chosen the KU All-Time team by the Lawrence Journal-World.
Zook was drafted by the Los Angeles Rams in the 4th round (99th overall) of the 1969 NFL Draft. He was traded to the Philadelphia Eagles and then by the Eagles to the Atlanta Falcons, where began his NFL career in 1969. Zook played 144 games in the NFL and was a Second-team All-Pro selection in 1973. He had been a Second-team All-NFC selection in 1972 and 1973 and was voted to the 1973 Pro Bowl. Zook was traded to the St. Louis Cardinals in 1976 and finished his career there.