Baseball Celebrates Clemente with “21” Patches; Pirates and Award Winners All Wearing #21 – SportsLogos.Net News
Pirates come apart in 9th inning, suffer frustrating loss to Yankees
Retire 21: Supporters Seek To Honor Baseball Legacy Of Roberto Clemente
December 31: ¡Arriba Roberto! - Sports Illustrated Vault
The Writers Are Bad': Roberto Clemente and the Press – Society for American Baseball Research
Carlos Delgado says MLB should retire Roberto Clemente's No. 21
April 13, 1969: Clemente booed at Forbes Field, spearheads game-winning rally for Pirates – Society for American Baseball Research
Should MLB retire Roberto Clemente's No. 21?
Pirates walk off on Roberto Clemente Day as push to retire his No. 21 continues
MLB Celebrates Roberto Clemente Day
Roberto Clemente: More than Latin America's baseball star
OTL: The enduring mystery of Roberto Clemente's bat - ESPN
MLB celebrates Roberto Clemente Day, ceremony at Citi Field
Roberto Clemente: Cincinnati Reds' José De León wants MLB to retire 21
Roberto Clemente as influential as ever 50 years after death - Los Angeles Times