
Chicago, Illinois, USA
Jacques Joseph O'Mahoney, known professionally as Jock Mahoney, was an American actor and stuntman. He starred in two Western television series, The Range Rider and Yancy Derringer. He played Tarzan in two feature films and was associated in various capacities with several other Tarzan productions. He was sometimes credited as Jack O'Mahoney or Jock O'Mahoney. Jock entered the University of Iowa in Iowa City and excelled at swimming and diving, but dropped out to enlist in the United States Marine Corps when World War II began. He served as a pilot, flight instructor, and war correspondent. After his discharge from the Marine Corps, Mahoney moved to Los Angeles, and for a time was a horse breeder. However, he soon became a movie stuntman, doubling for Gregory Peck, Errol Flynn, and John Wayne. Most of Mahoney's films of the late 1940s and early 1950s were produced by Columbia Pictures. Like many Columbia contract players, Mahoney worked in the studio's two-reel comedies. Beginning in 1947, he starred with the Three Stooges in their films Out West, Squareheads of the Round Table (and its remake, Knutzy Knights), Fuelin' Around, and Punchy Cowpunchers. Beginning in 1950, Columbia management gave him starring roles in adventure serials. Mahoney contributed so much to this series that he was awarded featured billing and major supporting roles as well, first as villains and then as sympathetic characters. By 1952 Columbia was billing him as Jack Mahoney. Cowboy star Gene Autry, then working at Columbia, hired Mahoney to star in a television series. Autry's Flying A Productions filmed 79 half-hour episodes of the syndicated The Range Rider from 1951 to 1953. For the 1958 television season, he starred in the somewhat Western Yancy Derringer series for 34 episodes, which aired on CBS. Yancy Derringer was a gentleman adventurer living in New Orleans, Louisiana, after the American Civil War. He had a Pawnee Indian companion named Pahoo Katchewa ("Wolf Who Stands in Water"), who did not speak, played by X Brands. Pahoo had saved the life of Derringer, and thereafter was responsible for Derringer's life. In 1962, Mahoney became the 13th actor to portray Tarzan when he appeared in Tarzan Goes to India, shot on location in India. A year later, he again played the role in Tarzan's Three Challenges, shot in Thailand. Dysentery and dengue fever plagued Mahoney during the shoot in the Thai jungles, and he plummeted to 175 pounds. He needed a year and a half to regain his health. Owing to his health problems and the fact that producer Weintraub had decided to go for a "younger look" for the apeman, his contract was mutually dissolved. In the 1980s, Mahoney made guest appearances on the television series B. J. and the Bear and The Fall Guy. During the final years of his life, he was a popular guest at film conventions and autograph shows. Mahoney died of a second stroke at age 70, two days after being involved in an automobile accident in Bremerton, Washington. His ashes were scattered into the Pacific Ocean.

as Leo

as Coley Bennett
1968

as Hoyt Herrold
1972

as Leo
1966

as Oldtimer #1 in Saloon
1981

as Captain Brian Donahoe
1959

as O'Connor
1964

as Wild Dan Wilde
1981

as Barry James
1958

1972

as Hoby Wallington
1966

as Vance Ludlow
1955

as Albert Bates
1972
as Self
1984

as Tarzan (Archive Footage)
2017
as Self (archive footage)
2015

as Tarzan (archive footage)
1996
as Self
1984

as Self
1979

as Sgt. Berry
1973

as The Colonel
1970

as Driver
1968

as Stoner
1968

as Smiley
1967

as Randy Minola
1965

as Jefferson Stark
1964

as Lt. Jim Sorenson
1964

as Don Michael O'Casey
1963

as Tarzan
1963

as Tarzan
1962

as Duke Wallace
1961

as Coy Banton
1960

as 'Silver' Ward Hogan
1958

as Immerman
1958

as Brad Ellison
1958

as Slim Carter (Hugh Mack)
1957

as The Stranger
1957

as Commander Harold 'Alan' Roberts
1957
as Leo
2 ep.

as Coley Bennett
2 episodes

as Hoyt Herrold
2 episodes

as Leo
2 episodes

as Oldtimer #1 in Saloon
1 episodes

as Captain Brian Donahoe
1 episodes

as O'Connor
1 episodes

as Wild Dan Wilde
1 episodes

as Barry James
1 episodes

1 episodes

as Hoby Wallington
4 episodes

as Vance Ludlow
1 episodes

as Albert Bates
1 episodes

2 episodes

as Driver
1 episodes

as Yancy Derringer
34 episodes

as Andy Hagen
1 episodes

as Mark Richards
1 episodes

as Halsey Roland
1 episodes

as The Range Rider
77 episodes

as Davidson
1 episodes
Stunt Double