Pirates will honor Roberto Clemente by wearing his No. 21 on their jerseys - ESPN

Roberto Clemente: Remembering the Pirates Hall of Famer 50 years after his death – Boston 25 News

Que Viva Clemente! Roberto Lives On in the Hearts of Latino Major Leaguers – Society for American Baseball Research

Pirates will wear Roberto Clemente No. 21

Some MLB Players Wearing #21, All Wearing 21 Patches Today for Roberto Clemente Day – SportsLogos.Net News

LEADING OFF: Pirates, Puerto Rican MLBers wear Clemente's 21 –

MLB allows Puerto Rican players to wear No. 21 on Roberto Clemente Day - ESPN

Curve to retire No. 21, honor Roberto Clemente and family

Pittsburgh Pirates each don No. 21 to honor Roberto Clemente - ESPN

For the 'Great One': Pirates, MLB honor Roberto Clemente

Roberto Clemente day: Puerto Rican MLB players, Pirates wear No. 21

Rays Star Calls Wearing No. 21 on Roberto Clemente Day 'An Honor

Pittsburgh Pirates each don No. 21 to honor Roberto Clemente - ESPN

All Pirates Wearing #21, Rest of MLB Wears Patches in Honour of Roberto Clemente – SportsLogos.Net News