Bill Russell's No. 6 Joins Rare Class of Retired Jersey Numbers - The New York Times
MLB players to wear No. 42 — in Dodger blue — for 75th anniversary of Jackie Robinson's big league debut
Last player to wear No. 42 for each MLB team
The Top Current MLB Player Wearing Each Number from 1 to 50, News, Scores, Highlights, Stats, and Rumors
Retired number, sports award
List of Major League Baseball retired numbers - Wikipedia
Armanis Romero paces Boston English win, honors Jackie Robinson
MLB allows more players to wear No. 21 to honor Roberto Clemente – NBC Sports Chicago
Every MLB team's retired numbers – NBC Sports Chicago
Why are MLB players wearing No. 42 jerseys today?
April 15, 1997: Ken Griffey Jr. wears number 42 to honor Jackie Robinson on 50th anniversary – Society for American Baseball Research
The Final 42: Looking Back At Mariano Rivera's Phenomenal Career
The No. 42 All-Star team
Jackie Robinson Day 2020, All Players Wearing #42 and Patches Today – SportsLogos.Net News