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Mariners at forefront of establishing Jackie Robinson Day
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Last player to wear No. 42 for each MLB team
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Why is today Jackie Robinson Day? The reason MLB players wear 42 & more to know about baseball's annual April 15 tribute
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The Only Day MLB Players Can Wear No. 42 » Britannica
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Mariano Rivera Wearing Jackie Robinson's 42 to the End - The New York Times
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All MLB players to wear No. 42 in Dodger blue on Apr. 15
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Jackie Robinson Day 2023: MLB players wear No. 42 to honor trailblazer
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MLB Network - Wearing the number 42 was a tremendous honor
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Minnesota Twins: Top 3 Players to wear Number 42 in Team History
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Uniform number (Major League Baseball) - Wikipedia
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The Red Sox And All MLB Teams Celebrate Diversity On Jackie Robinson Day By Wearing #42
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A's, Astros walk off field in protest, game postponed
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Ken Griffey Jr. had Jackie Robinson Day idea
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Red Sox acknowledge uncomfortable reality on Jackie Robinson Day: No Black players on the roster - The Boston Globe