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Jock Mahoney
ACTOR

Jock Mahoney

Known for Batman · Kung Fu · The Fall Guy

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…

Snapshot 2026-10-16

Born
Feb 7, 1919
Died
Dec 14, 1989
Birthplace
Chicago, Illinois, USA
Known For
Acting

Biography

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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Known For

Filmography

Movies

Son of the GuardsmanCaptain Kenley (uncredited)
1946
The Fighting FrontiersmanWaco (uncredited)
1946
Out WestArizona Kid
1947
The Stranger From Ponca CityHenchman Tensleep (uncredited)
1947
Adventures of Don JuanStunts
1948
Silver RiverStunt Double
1948
Squareheads of the Round TableCedric the Blacksmith
1948
Yellow SkyStunt Double
1948
You Gotta Stay HappyStunt Double
1948
Bandits of El DoradoTim Starling (uncredited)
1949
Colorado TerritoryStunt Double
1949
Fuelin' AroundGuard
1949
Horsemen of the SierrasBill Grant
1949
Lust for GoldStunts
1949
Renegades of the SageLieutenant Hunter
1949
Rim of the CanyonPete Reagan
1949
The Blazing TrailFull-House Patterson
1949
The Doolins of OklahomaTulsa Jack Blake
1949
Cody of the Pony ExpressJim Archer
1950
Cow TownTod Jeffreys
1950
Frontier OutpostLieutenant Peck (uncredited)
1950
HoedownStoney Rhodes
1950
Lightning GunsRob Saunders
1950
Punchy CowpunchersElmer
1950
Texas DynamoBill Beck
1950
The Kangaroo KidTex Kinnane
1950
The NevadanSandy
1950
The NevadanStunt Double
1950
Pecos RiverJack Mahoney
1951
Roar of the Iron HorseJim Grant
1951
Santa FeCrake
1951
The Lady and the BanditTavern Troublemaker
1951
The Lady and the BanditStunt Double
1951
The Texas RangersDuke Fisher
1951
The Texas RangersStunts
1951
Junction CityJack Mahoney
1952
Laramie MountainsSwift Eagle
1952
Smoky CanyonJack Mahoney
1952
The Hawk of Wild RiverJack Mahoney
1952
The Kid from Broken GunJack Mahoney
1952
The Rough, Tough WestBig Jack Mahoney
1952
The World in His ArmsStunt Double
1952
Gunfighters of the NorthwestJoe Ward
1954
Knutzy KnightsCedric the Blacksmith
1954
Overland PacificRoss Granger
1954
A Day of FuryMarshal Allan Burnett
1956
Away All Boats
1956
Away All BoatsAlvick
1956
I've Lived BeforeJohn Bolan / Lt. Peter Stevens
1956
Showdown at AbileneJim Trask
1956
Battle HymnMaj. Frank Moore
1957
Joe DakotaThe Stranger
1957
Slim CarterSlim Carter (Hugh Mack)
1957
Slim CarterStunts
1957
The Land UnknownCommander Harold 'Alan' Roberts
1957
A Time to Love and a Time to DieImmerman
1958
Money, Women and Guns'Silver' Ward Hogan
1958
The Last of the Fast GunsBrad Ellison
1958
Tarzan the MagnificentCoy Banton
1960
Three Blondes In His LifeDuke Wallace
1961
Tarzan Goes to IndiaTarzan
1962
CaliforniaDon Michael O'Casey
1963
Tarzan's Three ChallengesTarzan
1963
Moro Witch DoctorJefferson Stark
1964
The Walls of HellLt. Jim Sorenson
1964
Runaway GirlRandy Minola
1965
The Glory StompersSmiley
1967
Bandolero!Stoner
1968
The Love BugDriver
1968
Tarzan's Deadly SilenceThe Colonel
1970
The Bad BunchSgt. Berry
1973
When the West Was Fun: A Western ReunionSelf
1979
The Making of the StoogesSelf
1984
Tarzan at the Movies, Part 2: The Many Faces of TarzanTarzan (archive footage)
1996
SS
Salamat sa AlaalaSelf (archive footage)
2015
Tarzan: Lord of the MoviesTarzan (Archive Footage)
2017

Television

The Range RiderThe Range Rider · 77 eps
1951
Letter to LorettaAndy Hagen · 1 eps
1953
Letter to LorettaErnie McNally · 1 eps
1953
Letter to LorettaKim Ryan · 1 eps
1953
Letter to LorettaMike Elliott · 1 eps
1953
Letter to LorettaJim Vessey · 1 eps
1953
Letter to LorettaDan O'Hara · 1 eps
1953
The Wonderful World of DisneyDriver · 1 eps
1954
The MillionaireVance Ludlow · 1 eps
1955
77 Sunset StripBarry James · 1 eps
1958
Yancy DerringerYancy Derringer · 34 eps
1958
RawhideCaptain Brian Donahoe · 1 eps
1959
RawhideVance · 1 eps
1959
GunslingerHalsey Roland · 1 eps
1961
Daniel BooneO'Connor · 1 eps
1964
BatmanLeo · 2 eps
1966
BatmanH.L. Hunter · 1 eps
1966
TarzanHoby Wallington · 4 eps
1966
Hawaii Five-OColey Bennett · 2 eps
1969
BanacekAlbert Bates · 1 eps
1972
Emergency!Hoyt Herrold · 2 eps
1972
Kung FuDavidson · 1 eps
1972
The Streets of San Francisco1 eps
1972
The Streets of San FranciscoMr. Morley · 1 eps
1972
B. J. and the Bear2 eps
1979
Simon & SimonOldtimer #1 in Saloon · 1 eps
1981
The Fall GuyWild Dan Wilde · 1 eps
1981
The MasterMark Richards · 1 eps
1984

Photos

Jock Mahoney photo
Jock Mahoney photo
Jock Mahoney photo
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