Roberto Clemente - Wikipedia
Roberto Clemente Day: Why is Roberto Clemente celebrated and who
A's Vimael Machin 'honored' to wear No. 21 on Roberto Clemente Day
MLB allows Puerto Rican players to wear No. 21 on Roberto Clemente
Oakland A's: Happy Roberto Clemente Day! - Athletics Nation
Tonight was a monumental night:' Pirates, Josh Bell honor Clemente
Roberto Clemente Day: Pirates and Mets wear 21
Pirates Players Will Wear No. 21 on Sept. 9 to Honor Roberto
Roberto Clemente Day: Pirates and Mets wear 21