Jackie Robinson broke baseball's color barrier but these Black players still faced racism

The First Time Jackie Robinson Broke Baseball's Color Barrier – Rediscovering Black History

After Jackie: Players who followed Robinson to MLB also faced ongoing racism

Revisiting the Jackie Robinson story in 2021 – Orange County Register

Jackie Robinson, Biography, Statistics, Number, Facts, & Legacy

Jackie Robinson – Society for American Baseball Research

42 facts about Jackie Robinson to celebrate the 75th anniversary of his breaking the color barrier

Red Sox acknowledge uncomfortable reality on Jackie Robinson Day: No Black players on the roster - The Boston Globe

The History of Baseball and Civil Rights in America

Jackie Robinson becomes first African American player in Major League Baseball, April 15, 1947