Pittsburgh Pirates to wear No. 21 on Roberto Clemente Day
Remembering Roberto Clemente as a Black man who fought against racial injustice - Los Angeles Times
Pittsburgh Pirates each don No. 21 to honor Roberto Clemente - ESPN
Puerto Rican players follow Pirates' push to wear No. 21, celebrate Roberto Clemente
All Pirates Wearing #21, Rest of MLB Wears Patches in Honour of Roberto Clemente – SportsLogos.Net News
Roberto Clemente, Pittsburgh's Hero
Sources: MLB letting more players to wear No. 21 for Clemente Day
MLB celebrates Roberto Clemente Day
MLB allows more players to wear No. 21 to honor Roberto Clemente – NBC Sports Chicago
Why are MLB players wearing 21? Tributes around the league for Pirates legend explained
MLB celebrates Roberto Clemente Day, ceremony at Citi Field
MLB celebrates Roberto Clemente Day, ceremony at Citi Field
Puerto Rican players follow Pirates' push to wear No. 21, celebrate Roberto Clemente
MLB celebrates Roberto Clemente Day, ceremony at Citi Field