Lee Rocker (born Leon Drucker, August 3, 1961) is an American double bass player. He is a member of the rockabilly band The Stray Cats.
He is the son of the classical clarinetists Stanley Drucker (the retired principal clarinetist of the New York Philharmonic Orchestra) and Naomi Drucker. His sister Roseanne is a country music singer-songwriter. As a child, he played the cello, and later learned to play the electric bass.
Drucker's school friends included James McDonnell and Brian Setzer. The three of them played together regularly and widened their musical interests to include the blues and rockabilly. Drucker also learned to play the double bass to incorporate the sounds of blues and rockabilly on the acoustic instrument. The three of them formed the group The Stray Cats in 1979. McDonnell took on the stage name of "Slim Jim Phantom", and Drucker devised his own stage name of "Lee Rocker". Rocker evolved his own style of slap-bass playing with the group.
Rocker and the Stray Cats sold nearly 10 million albums and garnered twenty three gold and platinum certified records worldwide, and made them a mainstay on MTV. In addition to Stray Cats, Lee Rocker and Phantom Rocker and Slick albums, Rocker has recorded or performed with Carl Perkins, George Harrison, Ringo Starr, Willie Nelson, Leon Russell, Keith Richards, John Fogerty, and Scotty Moore. Rocker was nominated for a Grammy Award in 1982, as was his father, they are the second father-son duo to be nominated for a Grammy in the same year. He considered to be an influential upright bassist in Rock n' Roll.