Curve Set to Retire No. 21 In Honor of Roberto Clemente
MLB's Puerto Rican-born players honor Roberto Clemente by wearing 21
Yankees help pay tribute to former Pirates great Roberto Clemente - Newsday
Roberto Clemente - Wikipedia
Sources: MLB letting more players to wear No. 21 for Clemente Day
Oakland A's: Happy Roberto Clemente Day! - Athletics Nation
Report: Puerto Rican MLB Players Allowed to Wear No. 21 on Roberto Clemente Day, News, Scores, Highlights, Stats, and Rumors
50 years after Roberto Clemente's death is time of introspection for Puerto Rican baseball
Rangers, MLB honor late Hall of Famer Roberto Clemente with uniform patch, jersey numbers
21 Facts You May Not Know About Roberto Clemente on the Anniversary of His Debut, News, Scores, Highlights, Stats, and Rumors
SF Giants' Ortiz, García to wear No. 21 on Roberto Clemente Day
Was Roberto Clemente the Best MLB Player to Wear No. 21?
MLB The Show 23: Roberto Clemente Day Program Breakdown - ShowZone
Roberto Clemente Day: MLB expands list of who can wear No. 21 to Pirates, Puerto Rican players, award nominees
For the 'Great One': PittsburghPirates, Major League Baseball honor Roberto Clemente