A power-pitcher, the 6 ft 5 inches, 230-pound right-handed Stan Williams joined the Los Angeles at age 22 back in 1958. His rookie season he had a 9-7 record and completed 3-of-21 starts. In 1959 he started 15 games, relieved in 20 others and went 5-5 for the regular season, and picked up the win in Game 2 of a special playoff vs Milwaukee to give Los Angeles the NL pennant. In Game 5 of the 1959 World Series, Stan Williams came in relief in the seventh inning and pitched two innings of shutout ball after starter Sandy Koufax in a 1-0 loss to the White Sox. The Dodgers won Game 6 and the Series over Chicago.
In 1962, Stan Williams was 14-12 for the season and this time in a special third and final playoff game for the NL pennant he walked in the winning run to give the SF Giants the pennant. In 1962 he was traded to the Yankees for slugging first baseman Moose Skowron.
Later Stan Williams pitched for various major league teams and retired in 1972, and later was a pitching coach with the Reds and Yankees.
In his career, the fastball thrower struck out 1305 batters in 1764.1 innings and compiled a 3.48 career ERA.