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.
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| Organization | Category | Movie |
|---|
The Range Rider
as The Range Rider
Episodes: 77
First Aired: Apr 05, 1951
Yancy Derringer
as Yancy Derringer
Episodes: 34
First Aired: Oct 02, 1958
Tarzan
as Hoby Wallington
Episodes: 4
First Aired: Sep 08, 1966
Emergency!
as Hoyt Herrold
Episodes: 2
First Aired: Jan 22, 1972
Batman
as Leo
Episodes: 2
First Aired: Jan 12, 1966
Rawhide
as Captain Brian Donahoe
Episodes: 2
First Aired: Jan 09, 1959
Hawaii Five-O
as Coley Bennett
Episodes: 2
First Aired: Sep 20, 1968
Simon & Simon
as Oldtimer #1 in Saloon
Episodes: 1
First Aired: Nov 24, 1981
Kung Fu
as Davidson
Episodes: 1
First Aired: Oct 14, 1972
77 Sunset Strip
as Barry James
Episodes: 1
First Aired: Oct 10, 1958
The Millionaire
as Vance Ludlow
Episodes: 1
First Aired: Jan 19, 1955
Daniel Boone
as O'Connor
Episodes: 1
First Aired: Sep 24, 1964
Letter to Loretta
as Andy Hagen
Episodes: 1
First Aired: Sep 20, 1953
The Master
as Mark Richards
Episodes: 1
First Aired: Jan 20, 1984
Letter to Loretta
as Ernie McNally
Episodes: 1
First Aired: Sep 20, 1953
Letter to Loretta
as Kim Ryan
Episodes: 1
First Aired: Sep 20, 1953
Letter to Loretta
as Mike Elliott
Episodes: 1
First Aired: Sep 20, 1953
Letter to Loretta
as Jim Vessey
Episodes: 1
First Aired: Sep 20, 1953
Letter to Loretta
as Dan O'Hara
Episodes: 1
First Aired: Sep 20, 1953
The Streets of San Francisco
as Mr. Morley
Episodes: 1
First Aired: Sep 23, 1972
The Fall Guy
as Wild Dan Wilde
Episodes: 1
First Aired: Nov 04, 1981
Batman
as H.L. Hunter
Episodes: 1
First Aired: Jan 12, 1966
Banacek
as Albert Bates
Episodes: 1
First Aired: Sep 13, 1972
B. J. and the Bear
Episodes: 2
First Aired: Feb 10, 1979
The Streets of San Francisco
Episodes: 1
First Aired: Sep 23, 1972
Popularity History
| Year | Month | Avg | Max | Min |
|---|---|---|---|---|
| 2024 | 6 | 9 | 13 | 4 |
| 2024 | 7 | 11 | 18 | 3 |
| 2024 | 8 | 12 | 29 | 5 |
| 2024 | 9 | 10 | 20 | 4 |
| 2024 | 10 | 5 | 11 | 2 |
| 2024 | 11 | 5 | 12 | 2 |
| 2024 | 12 | 7 | 11 | 4 |
| 2025 | 1 | 8 | 15 | 4 |
| 2025 | 2 | 5 | 10 | 1 |
| 2025 | 3 | 4 | 6 | 1 |
| 2025 | 5 | 1 | 2 | 1 |
| 2025 | 6 | 2 | 4 | 1 |
| 2025 | 7 | 1 | 2 | 0 |
| 2025 | 8 | 2 | 9 | 0 |