The only day MLB players can wear No. 42? Jackie Robinson Day
Jackie Robinson Day extends into orbit
The Only Day MLB Players Can Wear No. 42 » Britannica
Last player to wear No. 42 for each MLB team
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Jackie Robinson's No. 42 is retired to honor the man who broke the color barrier in baseball in 1947.
Robinson's 42 in Dodger blue for all uniforms on April 15
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