Negro Leagues had their own two-way stars
Percentage of Black players in MLB still low, but there are signs of growth - Chicago Sun-Times
The declining number of black baseball players is a huge problem - Over the Monster
MLB Demographics: What percentage of MLB players are Black?
Baseball's racial disparity continues, from Little League to the majors
Why MLB Has Low Percentage of Black Baseball Players
Why Are the Angels and Other MLB Teams Giving Good Players Away? - The Ringer
Why The Number Of African American Baseball Players Are Declining
10 Greatest Baseball Players of All Time
4 Black Baseball Players Who Followed Jackie Robinson's Lead in 1947