The Western League was the name of several leagues in American minor league baseball. First, its earliest progenitor, which existed from 1885 to 1899, was the predecessor of the American League. Later, during the 20th century, there were four incarnations of the Western League, including a Class D loop that played from 1939–41 and an independent loop (outside of "organized baseball") that began play in 1995. This article, however, concentrates on the two Class A leagues that played from 1900–37 and from 1947–58.