Pittsburgh Pirates to wear No. 21 on Roberto Clemente Day
Five Astros wear No. 21 on Roberto Clemente Day
Uniform number (Major League Baseball) - Wikipedia
Ríos, Hernández to wear uniform No. 21 on Roberto Clemente Day, by Rowan Kavner
Pirates celebrate Roberto Clemente Day 2020
Que Viva Clemente! Roberto Lives On in the Hearts of Latino Major Leaguers – Society for American Baseball Research
Pirates will honor Roberto Clemente by wearing his No. 21 on their jerseys - ESPN
Puerto Rican Astros to wear No. 21 Wednesday in honor of Roberto Clemente
MLB's Pirates will honor Roberto Clemente by wearing his number
To Honor Roberto Clemente, MLB Expands List of Who Can Wear No. 21 - Sports - Remezcla
Paley Center launches exhibit on Roberto Clemente Day 2023
ESPN - Roberto Clemente won 12 Gold Gloves, two World Series titles, an NL MVP award, got 3,000 hits and made 15 All-Star appearances. Thoughts?