Vimael Machin, Athletics honor Roberto Clemente
A's Vimael Machin 'honored' to wear No. 21 on Roberto Clemente Day
What Roberto Clemente means to Astros catcher Martin Maldonado
Chicago Tribune - Year 173 No. 230 (18 Aug 2021)
Vimael Machin, Athletics honor Roberto Clemente
BEHIND THE MIC - Home
Liga de Beisbol Profesional Roberto Clemente
Sources: Puerto Rican MLBers can wear No. 21 - Mountain Top Media
List of Major League Baseball players from Puerto Rico - Wikipedia