Conrad Yeatis "Sonny" Clark (July 21, 1931 – January 13, 1963) was an American jazz pianist and composer who mainly worked in the hard bop idiom.While visiting an aunt in California at age 20, Clark decided to stay and began working with saxophonist Wardell Gray. Clark went to San Francisco with Oscar Pettiford and after a couple months, was working with clarinetist Buddy DeFranco in 1953. Clark toured the United States and Europe with DeFranco until January 1956, when he joined The Lighthouse All-Stars, led by bassist Howard Rumsey.

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