The New York Mets selected outfielder John DeMerit from the Milwaukee Braves in the 1961 expansion draft. He made his Met debut in their second game in franchise history on April 13, 1962 as a pinch runner for pitcher Herb Moford. DeMerit would appear in just 14 games for the Mets before having his contract sold to Syracuse of the International League, but instead of reporting he decided to retire. During his brief stint with the Mets John DeMerit hit just .188 with one home run and one RBI. The highlight of his Met career occurred on May 16, 1962 when he hit his only home run and scored the winning run in the 11th inning in the Mets 6-5 win over the Chicago Cubs.
While with the Mets DeMerit wore number 29.
John DeMerit also played for the Milwaukee Braves from 1957-1959 and 1961.