Baseball color line

The color line, also known as the color barrier, in American baseball excluded African American players from Major League Baseball and its affiliated Minor Leagues until 1947 (with a few notable exceptions in the 19th century before the line was firmly established). Racial segregation in professional baseball was sometimes called a gentlemen's agreement, meaning a tacit understanding, as there was no written policy at the highest level of organized baseball, the major leagues. A high minor league's vote in 1887 against allowing new contracts with black players within its league sent a powerful signal that eventually led to the disappearance of black people from the sport's other minor leagues later that century, including the low minors.

After the line was in virtually full effect in the early 20th century, many black baseball clubs were established, especially from the 1920s to the 1940s when there were several Negro leagues. During this period, American Indians and native Hawaiians, including Prince Oana, were able to play in the Major Leagues. The color line was broken for good when Jackie Robinson signed with the Brooklyn Dodgers organization for the 1946 season. In 1947, both Robinson in the National League and Larry Doby with the American League's Cleveland Indians appeared in games for their teams.

Origins

Before the 1860s Civil War, black players participated in the highest levels of baseball. During the war, baseball rose to prominence as a way to bring soldiers from various regions of the country together. In the aftermath of the war, baseball became a tool for national reconciliation; due to the racial issues involved in the war, baseball's unifying potential was mainly pursued among white Americans.