The Negro leagues were United States professional baseball leagues comprising teams predominantly made up of African Americans. The term may be used broadly to include professional black teams outside the leagues and it may be used narrowly for the seven relatively successful leagues beginning in 1920 that are sometimes termed "Negro Major Leagues." In 1885 the Cuban Giants formed the first black professional baseball team. The first league, the National Colored Base Ball League, failed in 1887 after only two weeks owing to low attendance. The Negro American League of 1951 is considered the last major league season and the last professional club, the Indianapolis Clowns, operated amusingly rather than competitively from the mid-1960s to 1980s.