Outside The Confines: Everyone wore 21 - Bleed Cubbie Blue
Remembering Roberto Clemente as a Black man who fought against racial injustice - Los Angeles Times
MLB celebrates Roberto Clemente Day, ceremony at Citi Field - CBS Pittsburgh
Altoona Curve honors Pirates legend Roberto Clemente, retires No. 21
Pirates will wear Roberto Clemente No. 21
Hot take: Roberto Clemente Day should be just like Jackie Robinson Day💯⚾️ : r/mlb
Curve to retire No. 21, honor Roberto Clemente and family
Altoona Curve to officially retire Roberto Clemente's No. 21 during ceremony Friday
Altoona Curve honors Pirates legend Roberto Clemente, retires No. 21
How Roberto Clemente Jr. wants to honor his dad transcends retiring the iconic Pirate's numbers
Curve Set to Retire No. 21 In Honor of Roberto Clemente