Conversation so far:
What was significant about 1962?
In 1962, the Dodgers moved from the Los Angeles Coliseum.
Where did they move to?
to pitcher-friendly Dodger Stadium.
How was the stadium pitcher-friendly?
The new park had a large foul territory and a comparatively poor hitting background.
What was wrong with the hitting background?
CANNOTANSWER.
How did moving stadiums affect the team?
On June 30 against the expansion New York Mets, Koufax threw his first no-hitter.
Did he continue his no hitter streak?
CANNOTANSWER.
Are there any other interesting aspects about this article?
A numbness developed in Koufax's index finger on his left hand, and the finger became cold and white.

Question: Why did his finger become numb?
Self-contained rewrite: Why did Koufax's finger become numb?