1980 Eastern League season
The Eastern League season began on approximately April 1 and the regular season ended on approximately September 1. The Holyoke Millers defeated the Waterbury Reds two games to one to win the Eastern League Championship Series. Regular season. Standings. Notes: Playoffs. Semi-Finals Series. Holyoke Millers defeated Buffalo Bisons 2 games to 0. Waterbury Reds defeated Reading Phillies 2 games to 0. Championship Series. Holyoke Millers defeated Waterbury Reds 2 games to 1.