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.
The Land Unknown
(Commander Harold 'Alan' Roberts)
Away All Boats
Away All Boats
(Alvick)
Tarzan the Magnificent
(Coy Banton)
When the West Was Fun: A Western Reunion
(Self)
Battle Hymn
(Maj. Frank Moore)
A Time to Love and a Time to Die
(Immerman)
Tarzan's Three Challenges
(Tarzan)
Tarzan Goes to India
(Tarzan)
The Bad Bunch
(Sgt. Berry)
The Glory Stompers
(Smiley)
Money, Women and Guns
('Silver' Ward Hogan)
Showdown at Abilene
(Jim Trask)
The Doolins of Oklahoma
(Tulsa Jack Blake)
The Kangaroo Kid
(Tex Kinnane)
Squareheads of the Round Table
(Cedric the Blacksmith)
Fuelin' Around
(Guard)
Punchy Cowpunchers
(Elmer)
Marine Battleground
(Nick Rawlins)
I've Lived Before
(John Bolan / Lt. Peter Stevens)
Knutzy Knights
(Cedric the Blacksmith)
A Day of Fury
(Marshal Allan Burnett)
The Last of the Fast Guns
(Brad Ellison)
Three Blondes In His Life
(Duke Wallace)
Joe Dakota
(The Stranger)
Overland Pacific
(Ross Granger)
Moro Witch Doctor
(Jefferson Stark)
The Making of the Stooges
(Self)
The Texas Rangers
(Duke Fisher)
Out West
(Arizona Kid)
Slim Carter
(Slim Carter (Hugh Mack))
The Rough, Tough West
(Big Jack Mahoney)
Pecos River
(Jack Mahoney)
Hoedown
(Stoney Rhodes)
Salamat sa Alaala
(Self (archive footage))
Bandolero!
(Stoner)
Smoky Canyon
(Jack Mahoney)
Frontier Outpost
(Lieutenant Peck (uncredited))
The Walls of Hell
(Lt. Jim Sorenson)
Tarzan's Deadly Silence
(The Colonel)
The Nevadan
(Sandy)
The Fighting Frontiersman
(Waco (uncredited))
The Stranger From Ponca City
(Henchman Tensleep (uncredited))
The Blazing Trail
(Full-House Patterson)
The Hawk of Wild River
(Jack Mahoney)
Bandits of El Dorado
(Tim Starling (uncredited))
The Kid from Broken Gun
(Jack Mahoney)
Laramie Mountains
(Swift Eagle)
California
(Don Michael O'Casey)
Cow Town
(Tod Jeffreys)
Cody of the Pony Express
(Jim Archer)
Roar of the Iron Horse
(Jim Grant)
Runaway Girl
(Randy Minola)
Junction City
(Jack Mahoney)
Texas Dynamo
(Bill Beck)
Horsemen of the Sierras
(Bill Grant)
Renegades of the Sage
(Lieutenant Hunter)
Lightning Guns
(Rob Saunders)
Santa Fe
(Crake)
Rim of the Canyon
(Pete Reagan)
Gunfighters of the Northwest
(Joe Ward)
The Lady and the Bandit
(Tavern Troublemaker)
Son of the Guardsman
(Captain Kenley (uncredited))
Tarzan: Lord of the Movies
(Tarzan (Archive Footage))
77 Sunset Strip
(Barry James)
Simon & Simon
(Oldtimer #1 in Saloon)
Rawhide
(Captain Brian Donahoe)
Batman
(Leo)
The Range Rider
(The Range Rider)
Emergency!
(Hoyt Herrold)
Letter to Loretta
(Andy Hagen)
B. J. and the Bear
The Millionaire
(Vance Ludlow)
Kung Fu
(Davidson)
The Master
(Mark Richards)
Tarzan
(Hoby Wallington)
Yancy Derringer
(Yancy Derringer)
The Streets of San Francisco
Hawaii Five-O
(Coley Bennett)
Daniel Boone
(O'Connor)
Letter to Loretta
(Ernie McNally)
Letter to Loretta
(Mike Elliott)
Letter to Loretta
(Jim Vessey)
Letter to Loretta
(Kim Ryan)
Letter to Loretta
(Dan O'Hara)
The Fall Guy
(Wild Dan Wilde)
The Streets of San Francisco
(Mr. Morley)
Batman
(H.L. Hunter)
Banacek
(Albert Bates)