Major League Baseball has a diversity problem, experts say. This year's World Series is proof
World Series Does Not Feature Any US-Born Black Players; Philly Youth Team Looks to Change the Future – NBC10 Philadelphia
Baseball Demographics, 1947-2012 – Society for American Baseball Research
Top 100 MLB players of all time - Nos. 25-1 - ESPN
Play ball? African Americans interest in baseball wanes
The dominance of Afro-Latino MLB players
Where have African-American baseball players gone?
Black Major League players united for change
Moses Fleetwood Walker was the first African American to play pro baseball, six decades before Jackie Robinson
Why MLB Has Low Percentage of Black Baseball Players
Why are there so few black baseball players? - Quora