The Louisville Colonels were a Major League Baseball team that played in the American Association throughout that league's ten-year existence from 1882 until 1891, first as the Louisville Eclipse (1882-1884) and later as the Louisville Colonels (1885 -1891); they then joined the National League after the AA folded and played through the 1899 season. It was also the name of several minor league baseball teams that played in Louisville, Kentucky, in the 20th century.