Conversation so far:
How did the 1963 season start for Sandy Koufax?
In 1963, Major League Baseball expanded the strike zone. National League walks fell 13 percent. Koufax reduced his walk rate to 1.7 in 1963, which ranked fifth in the league.
Did Koufax suffer any injuries during the 1963 season?
Are there any other interesting aspects about the Sandy Koufax article?
Koufax won the NL MVP Award and the Hickok Belt, and was the first-ever unanimous selection for the Cy Young Award.
What records did Sandy Koufax set in 1963?
Koufax threw 11 shutouts, setting a new post-1900 record for shutouts by a left-handed pitcher that stands to this day.
How did the Dodgers team with Sandy Koufax do in 1963?
Facing the Yankees in the 1963 World Series, Koufax completed the Dodgers' series sweep with a 2–1 victory over Ford
In what other games did Sandy Koufax perform well in 1963 besides the 1963 World Series?
On May 11, Koufax no-hit the San Francisco Giants 8-0
How did Sandy Koufax perform in the 1963 post-season?
Series MVP Award for his performance
Are there any other interesting aspects about the Sandy Koufax article?
In 1963, Major League Baseball expanded the strike zone. National League walks fell 13 percent.

Question: How did this change in walks affect the game of baseball?
Self-contained rewrite: How did the change in walks due to expanded strike zone affect the game of baseball in 1963 for Sandy Koufax?