Some MLB Players Wearing #21, All Wearing 21 Patches Today for Roberto Clemente Day – SportsLogos.Net News
All Pirates Wearing #21, Rest of MLB Wears Patches in Honour of Roberto Clemente – SportsLogos.Net News
Dodgers' Justin Turner wins Roberto Clemente Award : r/baseball
Que Viva Clemente! Roberto Lives On in the Hearts of Latino Major Leaguers – Society for American Baseball Research
Twins balance playoff push, keeping players fresh and healthy for October – Twin Cities
MLB expands list of who can wear No. 21 to honor Roberto Clemente on Sept. 15 - ESPN
A Uni Watch Look at MLB's Roberto Clemente Day
Puerto Rican Astros to wear No. 21 Wednesday in honor of Roberto Clemente
Roberto Clemente's No. 21 is 'retired in our hearts' but not on most MLB rosters - The Athletic
Phillies, Marlins celebrate Roberto Clemente Day