Puerto Rican Twins don No. 21 in tribute to Roberto Clemente – Twin Cities
The Pittsburgh Pirates retire Roberto Clemente's uniform number 21 in a moving pre-game ceremony - This Day In Baseball
MLB celebrates Roberto Clemente Day as players wear No. 21, call for number to be retired
Five Astros wear No. 21 on Roberto Clemente Day
Retire No. 21 for Roberto Clemente - Our Esquina
Pittsburgh Pirates Roberto Clemente number 21 should be retired - ESPN - OneNacion Blog- ESPN
Roberto Clemente Archives
Pirates Preview: Chance to Salvage Series on Sunday
For Many Latino Players, Roberto Clemente's Number Is Off Limits, Too - The New York Times
Pirates walk off on Roberto Clemente Day as push to retire his No. 21 continues
Retire #21? Please don't! – FOB Sports (Friends of Bob)
Curve Set to Retire No. 21 In Honor of Roberto Clemente
Senate resolution honoring Pirates baseball legend Roberto Clemente
Liover Peguero Archives Pittsburgh Baseball Now