This day in baseball history

On May 23, 1960, Sandy Koufax allowed only one hit in the Dodgers’ 1-0 victory over the Pittsburgh Pirates, the eventual World Series winners that year. The only Pirate hit came in the second inning, a single by pitcher Bennie Daniels. Koufax walked six batters.
The win was Koufax’s first of the season. It brought his record to 1-4. He would finish the season with an 8-13 mark, bringing his lifetime record to 36-40. Fortunately for the Dodgers, he had shown enough brilliance of the kind he displayed in his one-hitter against the Pirates to keep them from giving up on him.
Koufax would emerge as a top flight pitcher in 1961 and then, between 1963-1966, pitch as well as anyone in baseball history ever has. When he retired due to injury after the 1966 season, he had thrown four no-hitters (the first in 1962), including a perfect game.