Why are MLB players wearing No. 42 jerseys today?
MLB on X: Honoring No. 42. #Jackie42 / X
MLB allows more players to wear No. 21 to honor Roberto Clemente
April 15, 1997: Ken Griffey Jr. wears number 42 to honor Jackie
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Why is today Jackie Robinson Day? The reason MLB players wear 42
Why every MLB player is wearing No. 42 on Monday
A's, Astros walk off field in protest, game postponed
What Happens to All Those No. 42 Jerseys? - The New York Times
Gott's Thoughts: College baseball needs to retire the No. 42
Robinson's 42 In Dodger Blue For All Uniforms On April 15
NBA Countdown: Which player wore No. 42 best in league history?
