Arthur Edward Pepper Jr. was an American jazz musician, mostly as an alto saxophonist. He occasionally performed and recorded on tenor saxophone, clarinet and bass clarinet. Active primarily in West Coast jazz, Pepper first came to prominence in Stan Kenton's big band. He was known for his emotionally charged performances and several stylistic shifts throughout his career, and was described by critic Scott Yanow as having "attained his goal of becoming the world's greatest altoist" at the time of his death in 1982.