Here's why it would be a bad idea for MLB to retire Roberto Clemente's No. 21
Pittsburgh Pirates to wear No. 21 on Sept. 9 to honor Roberto Clemente
Rangers, MLB honor late Hall of Famer Roberto Clemente with uniform patch, jersey numbers
Oakland A's: Happy Roberto Clemente Day! - Athletics Nation
Pirates will honor Roberto Clemente by wearing his No. 21 on their jerseys - ESPN
For Many Latino Players, Roberto Clemente's Number Is Off Limits, Too - The New York Times
Pittsburgh Pirates to wear No. 21 on Roberto Clemente Day
MLB's Pirates will honor Roberto Clemente by wearing his number
MLB celebrates Roberto Clemente Day to commemorate 50 years since the Hall of Famer's passing
Roberto Clemente Day: Pirates and Mets wear 21
Pittsburgh Pirates each don No. 21 to honor Roberto Clemente - ESPN
Wearing Roberto Clemente's No. 21 an honor for Francisco Lindor, Sandy Alomar Jr. and all Puerto Rican-born Cleveland Indians