Houston Astros: 8 players don No. 21 on Roberto Clemente Day
Roberto Clemente shines on opening day despite Pirates loss and guns down rookie Hal King - This Day In Baseball
MLB allows more players to wear No. 21 to honor Roberto Clemente – NBC Sports Chicago
Roberto Clemente getting the ball from his 3,000th hit. It would be his last : r/baseball
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Roberto Clemente day: Puerto Rican MLB players, Pirates wear No. 21
MLB honors Roberto Clemente in 21st annual event
Houston Astros: 8 players don No. 21 on Roberto Clemente Day
Roberto Clemente - Wikipedia
Thursday Newsletter time: Jose Trevino reminded of impact ballplayers can have after catching pupil passed away
Roberto Clemente: Baseball Rebel – Society for American Baseball Research
Athletics, Astros celebrate Roberto Clemente Day
Díaz homers in 7th to break tie, Astros beat A's 5-2
