Conversation so far:
When did Spahn make Warren Spahn's professional debut?
His major league career began in 1942 with the Braves and he spent.
How long did he spend with them?
and he spent all but one year with that franchise, first in Boston and then in Milwaukee.
He finished his career in.

Question: Did he lead the league in any categorizes?
Self-contained rewrite: Did Warren Spahn lead the league in any categorizes?