Pittsburgh Pirates will all wear No. 21 to celebrate Roberto

It's time for Roberto Clemente's No. 21 to be retired across baseball - Bucs Dugout

Pittsburgh Pirates, New York Mets players, coaches to all wear No. 21 on Roberto Clemente Day - ESPN

Pittsburgh Pirates to wear No. 21 on Roberto Clemente Day

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

Baseball celebrates Roberto Clemente Day to honour Puerto Rican legend - World Baseball Softball Confederation

MLB celebrates Roberto Clemente Day

Pirates players, coaches honored to wear No. 21 in celebration of Roberto Clemente Day

Why are MLB players wearing 21? Tributes around the league for Pirates legend explained

Roberto Clemente, Pittsburgh's Hero

Houston Astros: 8 players don No. 21 on Roberto Clemente Day

50 Years Later, the Pirates' Lineup of Color Still Resonates - The New York Times