Conversation so far:
What team signed Yogi Berra?
New York Yankees
How long was Yogi Berra there with the New York Yankees as a player?
1946 to 1963
What did Yogi Berra do in 1948?
He played in a Major League Baseball All-Star Game

Question: What was his best game?
Self-contained rewrite: What was Yogi Berra's best game?