Should MLB retire Roberto Clemente's jersey number?
Some MLB Players Wearing #21, All Wearing 21 Patches Today for Roberto Clemente Day – SportsLogos.Net News
MLB History - Remembering Roberto Clemente: 50 years after the plane crash - Bucs Dugout
Fightins to Retire Roberto Clemente's #21 - BCTV
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For Many Latino Players, Roberto Clemente's Number Is Off Limits, Too - The New York Times
Roberto Clemente Day Serves as Another Reminder to Retire No. 21
Retire 21: Supporters Seek To Honor Baseball Legacy Of Roberto Clemente
For the 'Great One': PittsburghPirates, Major League Baseball honor Roberto Clemente
Brent Suter on Twitter: Looking forward to the day when we all wear this number and it is retired league-wide. Special thanks to the Clemente family for giving me their blessing to
Should MLB retire Roberto Clemente's jersey number?
Iván Rodríguez Why MLB Needs To Retire Roberto Clemente's 21
Que Viva Clemente! Roberto Lives On in the Hearts of Latino Major Leaguers – Society for American Baseball Research
Clemente's #21 will not be retired across MLB despite report