MLB's Pirates will honor Roberto Clemente by wearing his number
MLB Celebrates Roberto Clemente Day
Family, friends and fans celebrate Clemente at fundraiser
Clemente Award winners will have 21 on caps for entire MLB career
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Sources: MLB letting more players to wear No. 21 for Clemente Day
Pirates players, coaches honored to wear No. 21 in celebration of Roberto Clemente Day
All Puerto Rican players can wear 21 on Roberto Clemente Day
Roberto Clemente Day: Pirates and Mets wear 21
MLB expands list of who can wear No. 21 to honor Roberto Clemente on Sept. 15 - ESPN
50 Years Later, the Pirates' Lineup of Color Still Resonates - The New York Times
FOCO Releases Bobbleheads, Embroidered Bear For Roberto Clemente Day
New FOCO bobblehead features legendary Pittsburgh Pirate Roberto Clemente