Angels and Mariners lock arms in show of support on Jackie Robinson Day – Orange County Register
After Jackie Robinson, MLB integration was halting - The Washington Post
The Only Day MLB Players Can Wear No. 42 » Britannica
Honoring Robinson's Achievement and Carrying On His Legacy - The New York Times
Jackie Robinson Day - Wikipedia
On Jackie Robinson Day, baseball's tribute to No. 42 goes virtual
The only day MLB players can wear No. 42? Jackie Robinson Day
Yankees are glad to be on the field for Jackie Robinson Day – New York Daily News
MLB Players to Wear 42 in Dodger Blue on Jackie Robinson Day – NBC Los Angeles