Known as "Haywire Mac," McClintock is a country musician and poet who sang "Big Rock Candy Mountain," which was featured in the film O' Brother Where Art Thou?
He ran away from home as a child to join the circus and went on to have many odd jobs including a being seaman, a civilian mule-train packer, and a railroader.
He was featured in Robert Crumb's series of Heroes of Blues, Jazz, and Country trading cards.
He was born to a railroad cabinet maker.
He was the first person to sing Joe Hill's song, "The Preacher and the Slave," in public.