The only day MLB players can wear No. 42? Jackie Robinson Day
Mariners at forefront of establishing Jackie Robinson Day
42: Jackie Robinson Day - We R Tacoma
Jackie Robinson Day: 4 Facts About His Jersey No. 42, Now Retired in MLB
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What more should MLB do to make real impact on Jackie Robinson Day? - Fish Stripes
What Happens to All Those No. 42 Jerseys? - The New York Times
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Mariners, Angels players honor Jackie Robinson - Lookout Landing
Rays to celebrate Jackie Robinson Breaking Barriers day on Saturday
