Mariners at forefront of establishing Jackie Robinson Day
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Why are MLB players wearing No. 42 jerseys today?
Last player to wear No. 42 for each MLB team
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The Red Sox could've signed Jackie Robinson. They gave him a sham tryout instead.
The only day MLB players can wear No. 42? Jackie Robinson Day
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The Red Sox And All MLB Teams Celebrate Diversity On Jackie Robinson Day By Wearing #42
Last player to wear No. 42 for each MLB team
Red Sox Jackie Robinson jerseys: How to buy jerseys and hats honoring the 75th Anniversary of Robinson breaking baseball's color barrier
Major League Baseball remembers No. 42 Jackie Robinson – The Denver Post
A detailed account of Jackie Robinson's first day in the Majors, by Jon Weisman
Jackie Robinson's No. 42 is retired to honor the man who broke the color barrier in baseball in 1947.