Leslie Edward Claypool is an American musician, best known as the founder, lead singer, bassist, and primary songwriter of the band Primus since its formation in 1984. Frequently considered to be one of the greatest bassists of all time, his playing style mixes tapping, flamenco-like strumming, whammy bar bends, and slapping.

Primus is an American rock band formed in El Sobrante, California in 1984. The band is currently composed of bassist/vocalist Les Claypool, guitarist Larry "Ler" LaLonde, and drummer Tim "Herb" Alexander. Primus originally formed in 1984 with Claypool and guitarist Todd Huth, later joined by drummer Jay Lane, though the latter two had departed the band by the beginning of 1989, and were replaced by LaLonde and Alexander respectively.