When did the negro league baseball exist?

Answer 1

The first organized league of teams consisting solely of African-Americans -- it was called the Negro National League -- was in 1920. This first league lasted until 1931. A second league, also called the Negro National League, was organized in 1933. Another league, the Negro American League, was launched in 1937. The former folded after the 1949 season, the latter held on until 1962.

Answer 2

The Negro National League disbanded after the 1949 season. The Negro American League continued playing games until 1958, but were barely a minor league. Schedules became increasingly erratic, and the teams were more a group of independent barn-stormers than part of a league.

Answer 3

The first league for African-American ball players was founded in 1887, even as some minor league clubs had such players on their rosters. The last such league folded in 1951.