Carlos Delgado says MLB should retire Roberto Clemente's No. 21
MLB Officially Announces Sept. 15 As Roberto Clemente Day – The Impact
SF Giants' Ortiz, García to wear No. 21 on Roberto Clemente Day
Roberto Clemente and the magic of No. 21 - MLB - ESPN
Vintage Retire Number 21 Pittsburgh Baseball in the Steel City
Roberto Clemente - Wikipedia
Roberto Clemente remains Latino legend 50 years after death
MLB gets it right with Roberto Clemente No. 21 jersey policy
MLB's Pirates will honor Roberto Clemente by wearing his number
Men's Pittsburgh Pirates Roberto Clemente Nike Gray Road Cooperstown Collection Player Jersey
Curve to retire No. 21 in honor of Pirates OF Roberto Clemente on July 21, Sports
Was Roberto Clemente the Best MLB Player to Wear No. 21?