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Jackie Robinson Day - Wikipedia
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Red Sox to wear three uniforms in series versus Angels: What they mean
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Last player to wear No. 42 for each MLB team
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Jackie Robinson Day: Every MLB player will wear No. 42 to honor baseball icon
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It's Time to Pull the Baseball Uniform Into the 21st Century - Racked
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Puerto Rican Twins don No. 21 in tribute to Roberto Clemente – Twin Cities
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A's, Astros walk off field in protest, game postponed
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Roberto Clemente: Cincinnati Reds' José De León wants MLB to retire 21
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Boston Red Sox's Alex Cora: 'I'm not a big-league manager or big-league player without Jackie Robinson'
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Jackie Robinson's Long Fight Against Discrimination, by Seth S. Tannenbaum, Weekend Caucus
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Jackie Robinson Day 2020, All Players Wearing #42 and Patches Today – SportsLogos.Net News