Five Astros wear No. 21 on Roberto Clemente Day
MLB expands list of who can wear No. 21 to honor Roberto Clemente on Sept. 15 - ESPN
Celebrating Roberto Clemente Day
Cleveland celebrates 2nd annual Roberto Clemente day
The Roberto Clemente Award: Brothers showing up for others - New York Amsterdam News
Roberto Clemente Day Baseball Hall of Fame
Roberto Clemente Day celebrated around MLB in 2023
Why are MLB players wearing 21? Tributes around the league for Pirates legend explained
Happy Roberto Clemente Day! One of the best things MLB does in my opinion. : r/baseball