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Why are MLB players wearing 21? Tributes around the league for Pirates legend explained
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Pirates Celebrate Roberto Clemente Day Throughout Pittsburgh, by Pittsburgh Pirates
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Indescribable': Pirates RF Joshua Palacios revels in Roberto Clemente Day celebration
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Indians' Francisco Lindor, Sandy Alomar Jr., MLB happy to celebrate Roberto Clemente Day
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Remembering Roberto Clemente as a Black man who fought against racial injustice - Los Angeles Times
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Roberto Clemente, Pittsburgh's Hero
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For the 'Great One'; Pirates, MLB honor Roberto Clemente
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Sources: MLB letting more players to wear No. 21 for Clemente Day
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For the 'Great One'; Pirates, MLB honor Roberto Clemente
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Roberto Clemente Day: Brent Suter celebrates MLB legend, wears No. 21
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Puerto Rican players follow Pirates' push to wear No. 21, celebrate Roberto Clemente
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ESPN: MLB to allow Pirates, Puerto Rican players, award nominees to wear No. 21 on Roberto Clemente Day
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Pirates to once again wear No. 21 for Roberto Clemente Day
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Pittsburgh, United States. 10th Sep, 2020. Pittsburgh Pirates right fielder Gregory Polanco (25) warms up in right field where a 21 has been painted to celebrate Roberto Clemente Day before the start