Conversation so far:
How did Hoyt Wilhelm get started in baseball?
He started playing baseball at Cornelius High School in Cornelius, North Carolina.
What team did Hoyt Wilhelm first play for?
Wilhelm first played for the New York Giants in 1952.
Did Hoyt Wilhelm have a favorite pitch?
Wilhelm's knuckleball approach would be effective for more than a few innings at a time.

Question: Who was he playing at his first at bat?
Self-contained rewrite: Who was Hoyt Wilhelm playing at his first at bat in the MLB?