Blue Jays players, personnel wear No. 21 in honour of Roberto Clemente
Uniform number (Major League Baseball) - Wikipedia
For Many Latino Players, Roberto Clemente's Number Is Off Limits
Roberto Clemente Day: Brent Suter celebrates MLB legend, wears No. 21
Puerto Rico MLB Roberto Clemente 21
Roberto Clemente: More than Latin America's baseball star
All of MLB's Puerto Rican players can wear No. 21 on Roberto
Roberto Clemente, A for Athlete
Report: Puerto Rican MLB Players Allowed to Wear No. 21 on Roberto
Some MLB Players Wearing #21, All Wearing 21 Patches Today for