Harry Kirby McClintock (October 8, 1884 – April 24, 1957), also known as "Haywire Mac", was an American railroad man, radio personality, actor, singer, songwriter, and poet, best known for his song "The Big Rock Candy Mountains".

McClintock was born on October 8, 1884, in Uhrichsville, Ohio.^{[1][non-primary source needed]} Both his parents were from nearby Tippecanoe, Ohio; however, his family moved to Knoxville, Tennessee soon after his birth. In his youth, McClintock ran away from home to join the circus and drifted from place to place throughout his life. He railroaded in Africa, worked as a seaman, supplied food and ammunition to American soldiers while working as a civilian mule-train packer in the Philippines, and in 1899 worked as an aid to newsmen in China covering the Boxer Rebellion.^{[citation needed]}

In America, Mac traveled as a railroader and minstrel.^[2][3] He worked for numerous railroads during his life.

On October 8, 1917, McClintock married Bessie K. Johnson in Farmington, Utah.^{[citation needed]} They had one daughter.^[2]

In 1925, McClintock participated in a KFRC Radio talent contest.^[4] His performance of his song "The Big Rock Candy Mountains" won him spots on two new KFRC radio shows: a children's program titled Mac and His Gang where he sang popular cowboy songs with his "Haywire Orchestry",^{[5][6][note 1]} and a variety program titled Blue Monday Jamboree, which he hosted with Meredith Willson, Bea Benaderet, Edna Fischer,^[8] and future I Love Lucy producer Jess Oppenheimer.^[9][10] McClintock was also a member of Al Pearce's The Happy Go Lucky Hour,^[11] a KFRC spin-off of Blue Monday Jamboree, alongside Edna Fischer and Tommy Harris.^[12]

"The Big Rock Candy Mountain" reached No. 1 on Billboard's "Hillbilly Hits" chart in 1939. The song was featured in the 2000 Coen brothers' film O Brother, Where Art Thou?.^[13] McClintock's song "The Old Chisholm Trail" was featured in the end credits of "The Grandest Enterprise Under God" (episode 5) of the TV documentary miniseries The West. He was included in Robert Crumb's series of "Heroes of Blues, Jazz and Country" trading cards.^[14]

McClintock was active in the Industrial Workers of the World (IWW). He served with Frank Little in the Fresno Free Speech Fight from January 12 to March 4, 1911, and participated in the Tucker Utah strike on June 14, 1913, with Joe Hill.^[15][16] McClintock wrote the marching song of the IWW, "Hallelujah, I'm a Bum", and he is credited with being the first person to sing Hill's song "The Preacher and the Slave" in public.^[17] In the early 1920s, McClintock worked and organized union men in the oil fields of West Texas, where he met and recruited author Jim Thompson, who later incorporated him into several short stories using the name Strawlegs Martin.^[18]

This section does not cite any sources. (April 2023)

• Initiated by W.F. Little into IWW Union No. 66 on March 4, 1911
• Deputy sheriff, San Francisco, California, deputized on February 7, 1930
• Screen Actors Guild, inducted as a member on May 5, 1939
• American Society of Composers, Authors and Publishers (ASCAP), inducted as a member on September 30, 1940