Sept. 30, 1972 – Roberto Clemente becomes the 11th major leaguer
The Great One: Roberto Clemente's Race to 3,000 Hits – Society for American Baseball Research
Nearly 50 years after his death, Roberto Clemente's legacy lives on - Pasquines
September 30, 1972 – Pittsburgh Pirates outfielder Roberto Clemente do
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SEPTEMBER 1972 Baseball Digest ROBERTO CLEMENTE PIRATES LOW GRADE M323
50 years later, Roberto Clemente remains gatekeeper of MLB's 3,000-hit club
Roberto Clemente joins 3,000 hits club in 1972 – New York Daily News
Clack: Remembering Roberto Clemente, a superstar with heart
21 Facts You May Not Know About Roberto Clemente on the Anniversary of His Debut, News, Scores, Highlights, Stats, and Rumors
MLB celebrates Roberto Clemente Day as players wear No. 21, call for number to be retired