The Pirates to wear 21 tomorrow (September 15) in honor of Clemente
Oakland A's: Happy Roberto Clemente Day! - Athletics Nation
2021 Roberto Clemente Day Through Photos
MLB honors Roberto Clemente in 21st annual event
Roberto Clemente 50th Anniversary
Roberto Clemente 50th Anniversary
All Puerto Rican players can wear 21 on Clemente Day
Baseball Celebrates Clemente with “21” Patches; Pirates and Award Winners All Wearing #21 – SportsLogos.Net News
A Look at MLB's 2021 Roberto Clemente Day Uniforms