Stephen Arthur Downes (born June 28, 1950) is an American DJ and voice actor. He is best known for his work as the voice of the Master Chief in the Halo video game series. He worked as a disc jockey at Los Angeles, California Album-oriented Rock radio stations KWST (1978–1981), KEZY-AM (1981–1982) and KLSX (1994), but is best remembered working evening drive at KLOS from 1982 to 1991.
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