The Louisville Colonels were a Major League Baseball team that played in the American Association (AA) throughout that league's ten-year existence from 1882 until 1891. They were known as the Louisville Eclipse from 1882–1884, and as the Louisville Colonels from 1885 to 1891. The latter name derived from the historic Kentucky colonels. After the AA folded in 1891, the Colonels joined the National League and played through the 1899 season.