Should MLB retire Roberto Clemente's jersey number?
Was Roberto Clemente the Best MLB Player to Wear No. 21?
Roberto Clemente Pittsburgh Pirates Nike Road Cooperstown
Curve Set to Retire No. 21 In Honor of Roberto Clemente
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New Jersey politicians move to retire Roberto Clemente's No. 21
Oakland A's: Happy Roberto Clemente Day! - Athletics Nation
Roberto Clemente's No. 21 is 'retired in our hearts' but not on
SF Giants' Ortiz, García to wear No. 21 on Roberto Clemente Day
MLB History - Remembering Roberto Clemente: 50 years after the
Angels coach Jose Molina puts Roberto Clemente's number on his
MLB allows more players to wear No. 21 to honor Roberto Clemente