MLB's Pirates will honor Roberto Clemente by wearing his number
Petition · MLB to RETIRE Roberto Clemente's Jersey ·
Altoona Curve honors Pirates legend Roberto Clemente, retires No. 21
Clemente's #21 will not be retired across MLB despite report
MLB celebrates Roberto Clemente Day, ceremony at Citi Field - New York Amsterdam News
50 years after tragic plane crash, Roberto Clemente's incredible legacy only continues to grow
Pittsburgh Pirates, New York Mets players, coaches to all wear No. 21 on Roberto Clemente Day - ABC7 New York
Carlos Delgado says MLB should retire Roberto Clemente's No. 21
MLB celebrates Roberto Clemente Day, ceremony at Citi Field