Leroy Vinnegar (July 13, 1928 – August 3, 1999) was an American jazz bassist. 　　Born in Indianapolis, the self-taught Vinnegar established his reputation in Los Angeles during the 1950s and 1960s. His trademark was the rhythmic "walking" bass line, a steady series of ascending or descending notes, and it brought him the nickname "The Walker". Besides his jazz work, he also appeared on a number of soundtracks and pop albums, notably Van Morrison's 1972 album, Saint Dominic's Preview. 　　He recorded extensively as both a leader and sideman. He came to public attention in the 1950s as a result of recording with Lee Konitz, André Previn, Stan Getz, Shorty Rogers, Chet Baker, Shelly Manne, Joe Castro and Serge Chaloff.[1] He played bass on Previn and Manne's My Fair Lady album, one of the most successful jazz records ever produced. He also performed on another of jazz's biggest hit albums, Eddie Harris and Les McCann's Swiss Movement, released in 1969. Leroy also spent time playing music at the Famous Lighthouse in Hermosa Beach California and a place in East Los Angeles called Digger's in the late 1950's with everyone mentioned above including Don Joham (drummer) and pianist. He moved to Portland, Oregon in 1986. In 1995, the Oregon State Legislature honored him by proclaiming May 1 Leroy Vinnegar Day. 　　Vinnegar died from a heart attack, at the age of 71, on August 3, 1999, in a hospital in Portland.