King's X is an American rock band formed in Springfield, Missouri in 1979. They were first called the Edge and later became Sneak Preview before settling on their current name in 1985. The band's current lineup has remained intact for more than four decades, consisting of vocalist and bassist Doug Pinnick, drummer Jerry Gaskill and guitarist Ty Tabor. Their music combines progressive metal, funk and soul with vocal arrangements influenced by gospel, blues, and British Invasion rock groups. Despite a largely underground reputation as the "musician's musicians", King's X was pivotal in the early development of progressive metal, and produced a series of early records considered essential within the genre. The band's lyrics are largely based on the members' struggles with religion and self-acceptance. King's X was ranked No. 83 on VH1's 100 Greatest Artists of Hard Rock.

Douglas Theodore Pinnick, sometimes stylized as dUg Pinnick or simply dUg, is an American musician best known as the bass guitarist, co-lead vocalist, and songwriter for the hard rock and progressive metal band King's X. He has performed on 15 albums with King's X and recorded four solo albums. Pinnick has also participated in numerous side projects and has multiple guest appearances to his credit. He is recognized for his unique vocals, and heavily distorted bass tone. Pinnick often plays bass with a guitar pick, though he has also been seen using his fingers.