Nats DH Cruz, other Clemente Award winners wear '21' on caps
Bill Russell's No. 6 Joins Rare Class of Retired Jersey Numbers - The New York Times
Baseball Celebrates Clemente with “21” Patches; Pirates and Award Winners All Wearing #21 – SportsLogos.Net News
Here's why it would be a bad idea for MLB to retire Roberto Clemente's No. 21
Major League Baseball Cancels Series In Puerto Rico Due To Zika Concerns : The Two-Way : NPR
MLB allows more players to wear No. 21 to honor Roberto Clemente – NBC Sports Chicago
MLB should retire Roberto Clemente's No. 21
All of MLB's Puerto Rican players can wear No. 21 on Roberto Clemente Day
MLB announces 30 nominees for 2022 Roberto Clemente Award – NBC Sports Bay Area & California
Roberto Clemente Award 2021 nominees
50YRS AGO, THE PITTSBURGH PIRATES FIELDED THE GREATEST BASEBALL TEAM TO EVER START A MLB GAME
Remembering Roberto Clemente as a Black man who fought against racial injustice - Los Angeles Times
Roberto Clemente: Celebrating a legacy – The Hive Sports
MLB allows Puerto Rican players to wear No. 21 on Roberto Clemente Day - ESPN
Some MLB Players Wearing #21, All Wearing 21 Patches Today for Roberto Clemente Day – SportsLogos.Net News