MLB expands list of who can wear No. 21 to honor Roberto Clemente on Sept. 15 - ESPN
All Puerto Rican players can wear 21 on Clemente Day
Five Astros wear No. 21 on Roberto Clemente Day
MLB honors Roberto Clemente in 21st annual event
Some MLB Players Wearing #21, All Wearing 21 Patches Today for Roberto Clemente Day – SportsLogos.Net News
Some MLB Players Wearing #21, All Wearing 21 Patches Today for Roberto Clemente Day – SportsLogos.Net News
Pirates will honour Roberto Clemente by wearing his No. 21 on Clemente Day - Article - Bardown
Pirates, Mets wear 21 on Roberto Clemente Day
Pirates, Mets wear 21 on Roberto Clemente Day
MLB honors Roberto Clemente in 21st annual event