What Happens to All Those No. 42 Jerseys? - The New York Times
The only day MLB players can wear No. 42? Jackie Robinson Day
MLB allows more players to wear No. 21 to honor Roberto Clemente – NBC Sports Chicago
The only day MLB players can wear No. 42? Jackie Robinson Day
Rabbi Helps Expand Jackie Robinson Tribute to Youth Leagues - The New York Times
Last player to wear No. 42 for each MLB team
Last player to wear No. 42 for each MLB team
Jackie Robinson - Facts, Quotes & Stats
Mariano Rivera - Wikipedia
D-backs to host Jackie Robinson Day events during homestand vs. Mets