MLB allows more players to wear No. 21 to honor Roberto Clemente
Roberto Clemente's #21 To Be Worn By All Pittsburgh Pirates For Clemente Day
Roberto Clemente as influential as ever 50 years after death - Los Angeles Times
Should Roberto Clemente's #21 Be Universally Retired Across MLB?
MORE
Hot take: Roberto Clemente Day should be just like Jackie Robinson Day💯⚾️ : r/mlb
All Puerto Rican players can wear 21 on Roberto Clemente Day
To Honor Roberto Clemente, MLB Expands List of Who Can Wear No. 21 - Sports - Remezcla
Pirates will wear Roberto Clemente No. 21
Roberto Clemente day: Puerto Rican MLB players, Pirates wear No. 21
MLB should retire Roberto Clemente's No. 21