It's Time for MLB to Do More to Celebrate Roberto Clemente
Campaign To Retire Roberto Clemente's No. 21 Throughout MLB Gains Traction
Who was a better baseball player: Tony Oliva or Roberto Clemente at their peak, and why? - Quora
MLB celebrates Roberto Clemente Day, ceremony at Citi Field - North Shore News
Many want #21 retired in MLB - ESPN - OneNacion Blog- ESPN
New Jersey politicians move to retire Roberto Clemente's No. 21 across all of baseball
Puerto Rican players follow Pirates' push to wear No. 21, celebrate Roberto Clemente
Puerto Rico Downs Dominican Republic in Thriller, But Díaz's Injury Sours the Night
Roberto Clemente Archives - Global Sport Matters
Divine intervention' and No. 21: The story of Roberto Clemente's 3,000th hit - The Athletic