Five Astros wear No. 21 on Roberto Clemente Day
Houston Astros: 8 players don No. 21 on Roberto Clemente Day
Roberto_Clemente
Today Is Roberto Clemente Day
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Pirates to wear No. 21 on jerseys for Roberto Clemente Day
Opening Day in MLB: New No. 21 patches, NL DHs and Guardians
Roberto_Clemente
Why some players have No. 21 on back of their baseball caps
MLB allows Puerto Rican players to wear No. 21 on Roberto Clemente
Should Roberto Clemente's #21 Be Universally Retired Across MLB
Murphy hits homer, two-run single, A's take 1st from Astros