In 1973, the team's home games were moved from Simpkins Field to the Dennis-Yarmouth High School baseball diamond, and Yarmouth proceeded to make its first appearance in the league championship series in the modern era. The team featured future major leaguer Dave Schuler, who was the winning pitcher in the league All-Star Game that year. Despite posting a losing record in the regular season, skipper Red Wilson's Red Sox upset regular-season champion Chatham in the semi-final playoff series. Yarmouth went on to drop the championship series in five games to a Cotuit team that was in the midst of a string of four consecutive league titles.