The Negro Leagues
The first African American to play professional baseball, Moses Fleetwood Walker (1857—1924) played for teams at Oberlin College and the University of Michigan before turning pro with the American Association in 1884. Walker went on to play for the Newark Little Giants and for teams in Cleveland and Syracuse, among others. Perhaps predictably, Walker encountered racism on the diamond—white players occasionally refused to take the field against him—and was forced out of professional baseball when the American Association and National League banned African Americans altogether. Baseball's Major League remained segregated until 1946.