Roberto Clemente Day: MLB expands list of who can wear No. 21 to Pirates, Puerto Rican players, award nominees | CBS Sports Headlines Roberto Clemente Day: MLB expands list of who can wear No. 21 to Pirates, Puerto Rican players, award nominees Wednesday is Roberto Clemente Day around baseball ESN … Continue reading Roberto Clemente Day: MLB expands list of who can wear No. 21 to Pirates, Puerto Rican players, award nominees