LEADING OFF: Pirates, Puerto Rican MLBers wear Clemente's 21 - The San Diego Union-Tribune
Roberto Clemente Foundation 21
Carlos Delgado says MLB should retire Roberto Clemente's No. 21
For Many Latino Players, Roberto Clemente's Number Is Off Limits, Too - The New York Times
Roberto Clemente day: Puerto Rican MLB players, Pirates wear No. 21
Pirates, Mets to all wear No. 21 on Clemente Day
Today Is Roberto Clemente Day
Pirates to once again wear No. 21 for Roberto Clemente Day
A Uni Watch Look at MLB's Roberto Clemente Day
Roberto Clemente - Wikipedia
New FOCO bobblehead features legendary Pittsburgh Pirate Roberto Clemente
MLB expands list of who can wear No. 21 to honor Roberto Clemente on Sept. 15 - ESPN
Pirates will wear Roberto Clemente No. 21