Honoring Robinson's Achievement and Carrying On His Legacy - The New York Times
April 15, 1997: Ken Griffey Jr. wears number 42 to honor Jackie Robinson on 50th anniversary – Society for American Baseball Research
Jackie Robinson Day: The only time MLB players can wear No. 42
Jackie Robinson Day: Red Sox uniforms will feature blue 42s to commemorate the 75th anniversary of MLB's color barrier being broken
Never forget 42 MLB celebrates Jackie Robinson Day
MLB players to wear #42 Monday to honor Jackie Robinson Day
No. 42 jersey tribute began in 2007 with Griffey
MLB celebrates Jackie Robinson Day: 15-16 April - World Baseball Softball Confederation
Jackie Robinson Day - Wikipedia
42, Maybe Tomorrow We´ll All Wear 42
Red Sox notebook: On Jackie Robinson Day, Alex Cora wants his team to play the right way
A very special Jackie Robinson Day to celebrate the 75th Anniversary of Jackie joining MLB
42: Jackie Robinson Day - We R Tacoma
Calls for justice continue as baseball celebrates Jackie Robinson Day - The Boston Globe
Mariners, Angels players honor Jackie Robinson - Lookout Landing