In June 1957, Red Sox scout Joe Dugan signed Gibson to a contract with the Oklahoma City Indians of the Texas League, although Gibson never played for them. Gibson played for ten years in Minor League Baseball, spending seasons in the Class D Midwest League and New York–Penn League (1957–1958), Class B Carolina League (1959–1961), Class A Eastern League (1962), Triple-A Pacific Coast League (1963–1964), and Triple-A International League (1965–1966).
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