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".

[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.

[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.

[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.