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In page Bruce Sutter:

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Sutter split the 1974 season between the Class A Key West Conchs and the Class AA Midland Cubs. Though he finished the season with a combined 2–7 record, he recorded a 1.38 ERA in 65 innings. He returned to Midland in 1975 and finished the year with a 5–7 record, a 2.15 ERA and 13 saves.[1] Sutter led the team in ERA and saves as they won the Texas League West Division pennant.[4] He started the 1976 season with the Class AAA Wichita Aeros, but he pitched only seven games with the team before being promoted to the major leagues.[1]