Pittsburgh Pirates each don No. 21 to honor Roberto Clemente - ESPN
Pittsburgh Pirates Roberto Clemente number 21 should be retired
Altoona Curve to officially retire Roberto Clemente's No. 21
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Altoona Curve to retire Roberto Clemente's No. 21
2019 Altoona Curve Media Guide by Altoona Curve - Issuu
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Curve to retire No. 21, honor Roberto Clemente and family
Living out the legacy: Curve retire No. 21 as reminder of
50 years after tragic plane crash, Roberto Clemente's incredible
The Pittsburgh Pirates retire Roberto Clemente's uniform number 21
Altoona Curve retire Roberto Clemente's number