Angels and Mariners lock arms in show of support on Jackie Robinson Day – Orange County Register
Red Sox acknowledge uncomfortable reality on Jackie Robinson Day: No Black players on the roster - The Boston Globe
Why The Red Sox Gave Jackie Robinson A 'Tryout' Before He Joined The Dodgers
The Real Story of Baseball's Integration That You Won't See in 42 - The Atlantic
Jackie Robinson, Biography, Statistics, Number, Facts, & Legacy
Facts about Jackie Robinson, The Learning Key
MLB Celebrates Jackie Robinson's 75th Anniversary of Breaking Color Barrier
D-backs' next retired number prediction
Jackie Robinson Day: 4 Facts About His Jersey No. 42, Now Retired in MLB
An oral history of the night baseball stopped to retire No. 42 forever - ABC7 New York
Mariners at forefront of establishing Jackie Robinson Day