This Day In Baseball History: July 19, 1960 - Juan Marichal of the San Francisco Giants became the first pitcher…
Ever wonder the backstory of Giants' 'Greatest Game Ever Pitched?' – NBC Sports Bay Area & California
Whicker: Warren Spahn was a once-a-century phenomenon – Orange County Register
Marichal pitches one-hitter in MLB debut
Warren Spahn Windup (c.1957) - Photofile Inc. – Sports Poster Warehouse
July 2, 1963: Marichal outduels Spahn in 16-inning thriller – Society for American Baseball Research
Chicopee legend Al Stanek had bird's-eye view of 'Greatest Game Ever Pitched'
Marichal-Spahn epic duel was 50 years ago – The Mercury News
Warren Spahn Archives
Del Crandall, All-Star Catcher With Champion Braves, Dies at 91 - The New York Times
Juan Marichal, Warren Spahn and the greatest game ever pitched
Juan Marichal, Warren Spahn and the greatest game ever pitched
The Anniversary of One of Greatest Pitching Duels Ever! Spahn vs. Marichal, July 2, 1963