Honored to wear 21 with those across @mlb as we celebrate the life
All Pirates Wearing #21, Rest of MLB Wears Patches in Honour of Roberto Clemente – SportsLogos.Net News
Pirates will honor Roberto Clemente by wearing his No. 21 on their jerseys - ESPN
MLB celebrates Roberto Clemente Day as players wear No. 21, call for number to be retired
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No. 21 Deserves to be Hailed. But Not Like No. 42
Houston Astros: 8 players don No. 21 on Roberto Clemente Day
MLB Clemente Award winners wear his 21 on caps for careers - NBC Sports
Puerto Rican Twins don No. 21 in tribute to Roberto Clemente – Twin Cities
Congressman José E. Serrano
Roberto Clemente Day: MLB expands list of who can wear No. 21 to Pirates, Puerto Rican players, award nominees
How the Yankees celebrated Jackie Robinson Day - Pinstripe Alley