How did racial segregation affect Black baseball players before 1947?

Before 1947, racial segregation in baseball—often referred to as the color line—systematically excluded Black players from the major and minor leagues through a combination of formal decrees and a tacit "gentlemen’s agreement" among team owners.12

While no official rule explicitly banned Black athletes, the National Association of Base Ball Players established a exclusionary precedent in 1867. By the late 19th century, despite some Black players participating in professional leagues, harassment and discriminatory practices—such as team mutinies and refusals to play against Black opponents—forced them out of organized white baseball.12

Consequently, Black players were compelled to form their own teams and leagues, such as the Negro National League and the Negro American League. These organizations provided a platform for exceptional talent, including stars like Josh Gibson and Satchel Paige, to compete. However, these leagues faced significant financial instability, often struggling to secure permanent ballparks and consistent scheduling. This era of segregation denied Black players equal opportunity, forcing them to navigate a separate, marginalized professional structure until the integration of the major leagues began in 1947.1234