Five Astros wear No. 21 on Roberto Clemente Day
Pirates will honor Roberto Clemente by wearing his No. 21 on their jerseys - ESPN
The Pittsburgh Pirates retire Roberto Clemente's uniform number 21 in a moving pre-game ceremony - This Day In Baseball
Pittsburgh Pirates, New York Mets players, coaches to all wear No. 21 on Roberto Clemente Day - ESPN
All Pirates Wearing #21, Rest of MLB Wears Patches in Honour of Roberto Clemente – SportsLogos.Net News
Roberto Clemente's #21 To Be Worn By All Pittsburgh Pirates For Clemente Day
Pittsburgh Pirates each don No. 21 to honor Roberto Clemente - ESPN
Roberto Clemente T-Shirt Roberto Clemente Pirates Tee - Pirates Store
All Pirates Wearing #21, Rest of MLB Wears Patches in Honour of Roberto Clemente – SportsLogos.Net News
Pirates to wear No. 21 on Sept. 9 to honor Roberto Clemente – KXAN Austin