No, we do not need to retire Roberto Clemente's number across baseball - NBC Sports
Carlos Delgado says MLB should retire Roberto Clemente's No. 21
Roberto Clemente day: Puerto Rican MLB players, Pirates wear No. 21
MLB's Puerto Rican-born players honor Roberto Clemente by wearing 21
To Honor Roberto Clemente, MLB Expands List of Who Can Wear No. 21 - Sports - Remezcla
Report: Puerto Rican MLB Players Allowed to Wear No. 21 on Roberto Clemente Day, News, Scores, Highlights, Stats, and Rumors
Roberto Clemente Day: Pirates and Mets wear 21
The Yankees who are continuing Roberto Clemente's legacy - Pinstripe Alley
Roberto Clemente's #21 To Be Worn By All Pittsburgh Pirates For Clemente Day
Mets, Pirates to Wear No. 21 on Clemente Day - Metsmerized Online