Here's why it would be a bad idea for MLB to retire Roberto Clemente's No. 21
Some MLB Players Wearing #21, All Wearing 21 Patches Today for Roberto Clemente Day – SportsLogos.Net News
Watch Roberto Clemente, American Experience, Official Site
Report: Puerto Rican MLB Players Allowed to Wear No. 21 on Roberto Clemente Day, News, Scores, Highlights, Stats, and Rumors
Remembering the life and legacy of #21 on Roberto Clemente Day
MLB's Puerto Rican-born players honor Roberto Clemente by wearing 21
ESPN: MLB to allow Pirates, Puerto Rican players, award nominees to wear No. 21 on Roberto Clemente Day
Pirates to once again wear No. 21 for Roberto Clemente Day
Puerto Rican players follow Pirates' push to wear No. 21, celebrate Roberto Clemente