Puerto Rican players pushing for MLB to retire Clemente's number

When did Roberto Clemente get his first Major League Baseball (MLB) hit? - Quora

Roberto Clemente Archives - Global Sport Matters

Roberto Clemente's No. 21 is 'retired in our hearts' but not on most MLB rosters - The Athletic

Campaign To Retire Roberto Clemente's No. 21 Throughout MLB Gains Traction

Many want #21 retired in MLB - ESPN - OneNacion Blog- ESPN

MLB celebrates Roberto Clemente Day, ceremony at Citi Field - New York Amsterdam News

Major League Baseball marks Roberto Clemente Day with ceremony at Citi Field - ABC7 New York

It's time for Roberto Clemente's No. 21 to be retired across baseball - Bucs Dugout

September 30, 1972: Roberto Clemente collects 3,000th career hit in final at-bat – Society for American Baseball Research

MLB roundup: Rays honor Clemente, trounce Blue Jays

MLB celebrates Roberto Clemente Day as players wear No. 21, call for number to be retired

Why are Boston Red Sox players, coaches wearing No. 21? Kiké Hernández, Alex Cora and others honoring Roberto Clemente