The Amsterdam-Gloversville-Johnstown Jags was a primary moniker of the minor league baseball teams representing the cities of Amsterdam, New York, Gloversville, New York and Johnstown, New York between 1890 and 1908. Amsterdam and Amsterdam-Gloversville-Johnstown teams played as members of the New York State League from 1894 to 1895 and 1902 to 1908. Baseball Hall of Fame member Jack Chesbro pitched for the 1895 Johnstown Buckskins.