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.
What happened with Willie Dixon's boxing career?
Willie Dixon became a professional boxer and worked briefly as Joe Louis's sparring partner, but after four fights he left boxing in a dispute with his manager over money.
What did Willie Dixon do next in his life?
Dixon met Leonard Caston at a boxing gym, where they would harmonize at times.

Question: Was he a musician?
Self-contained rewrite: Was Willie Dixon a musician in adulthood?