Conversation so far:
Where was O'Malley born?
Bronx.
Who was his father?
Edwin Joseph O'Malley.
What did his father do?
worked as a cotton goods salesman in the Bronx.
Who was his mother?
Alma Feltner.
What did his mother do?
CANNOTANSWER.

Question: How did he get interested in baseball?
Self-contained rewrite: How did Walter O'Malley get interested in baseball?