Conversation so far:
What was Willie Dixon like in adulthood?
Dixon was a man of considerable stature, standing 6 feet 6 inches tall and weighing over 250 pounds.
What was Willie Dixon's profession in adulthood?
Boxing
Was Willie Dixon good at boxing?
Dixon was successful, winning the Illinois State Golden Gloves Heavyweight Championship (Novice Division) in 1937.

Question: What happened with his boxing career?
Self-contained rewrite: What happened with Willie Dixon's boxing career?