July 2, 1963: Marichal outduels Spahn in 16-inning thriller – Society for American Baseball Research
Marichal And Spahn And A Classic by The Bay, News, Scores, Highlights, Stats, and Rumors
Buffalo's Best: Men's No. 1: Warren Spahn
Juan Marichal - Cooperstown Expert
Marichal-Spahn epic duel was 50 years ago – The Mercury News
1964 Topps Baseball Cards and The Greatest Game Ever Pitched – Post War Cards
Warren Spahn - Wikipedia
He was a Giant? Warren Spahn joined the 1965 Giants for the NL pennant chase – Sports Radio Service
Buy The Greatest Game Ever Pitched: Juan Marichal, Warren Spahn, and the Pitching Duel of the Century Book Online at Low Prices in India
Warren Spahn Archives
Juan Marichal the Dominican Dandy : r/baseball
This Day in Braves History: Warren Spahn and Juan Marichal lock up in a pitcher's duel - Battery Power
NLCS 2010: Giants vs. Phillies and the Top 10 Pitching Matchups in MLB History, News, Scores, Highlights, Stats, and Rumors
Juan Marichal had one of the most LEGENDARY wind-ups! (10-time All Star and Hall of Fame pitcher)