George Michael Riley (born October 6, 1956) is a former Major League Baseball pitcher. He played parts of four seasons in the majors, between 1979 and 1986, for the Chicago Cubs, San Francisco Giants, and Montreal Expos. He graduated from South High School in Philadelphia in 1974 and was drafted by the Cubs in the fourth round of the 1974 amateur draft. His only major league victory came as a member of the Giants in 1984.

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