Earl Rudolph "Bud" Powell was an American jazz pianist and composer. A pioneer in the development of bebop and its associated contributions to jazz theory, Powell's application of complex phrasing to the piano influenced both his contemporaries and later pianists including Walter Davis, Jr., Toshiko Akiyoshi, and Barry Harris.
Born in the midst of the Harlem Renaissance to a musical family, Powell, during the 1930s, developed an attacking, right-handed approach to the piano, which marked a break from the left-handed approach of stride and ragtime that had been prevalent. Upon joining trumpeter Cootie Williams' band in 1943, he received attention from the broader musical community for his fluency and advanced technique. A severe beating by police in 1945 and years of electroconvulsive therapy treatments adversely impacted his mental health, but his recordings and live performances with Charlie Parker, Sonny Stitt, and Max Roach during the late 1940s and early 1950s were instrumental in shaping modern jazz piano technique.