The Philadelphia Athletics was the primary moniker of the minor league baseball teams based in Philadelphia, Pennsylvania. The minor league Philadelphia teams played various seasons in Philadelphia between 1877 and 1900. The minor league Philadelphia teams played as members of the League Alliance (1877), Eastern Championship Association (1881), League Alliance (1882), Middle States League (1889), Eastern League (1892), Pennsylvania State League (1894, 1896) and Atlantic League (1896–1897, 1900).