On April 28, 1961, Milwaukee Braves pitcher Warren Spahn threw his second no-hitter against the Giants at County Stadium. This feat made him the second-oldest pitcher in history to throw a no-hitter, at the age of 40 years and 5 days. At the time, the oldest pitcher to throw a no-hitter had been Cy Young, at 41 years old. That spot is now held by Nolan Ryan, who threw a no-hitter at the age of 44 on May 1, 1991.
Warren Spahn (Wikimedia Commons)