Conversation so far:
When did Bob Hayes's college career begin?
He was the AAU 100 yard dash champion three years running, from 1962-1964.
In what year did his career begin?
CANNOTANSWER.
Did he break any records?
he broke the 100-yard dash record with a time of 9.1.
Did he compete in the Olympics?
He was selected to represent the United States in the 1964 Summer Olympics in Tokyo.
Who are some competitors be beat?
CANNOTANSWER.
Did he tie any records?
he tied the world record of 9.2 seconds in the 100-yard dash.
Who was the tie against?
Frank Budd of Villanova University the previous year.
Did he break any other records?
the 60 yard dash with his indoor world record of 5.9 seconds.
Where else did he compete?
200 meter dash.
WHat is an interesting fact regarding his career?
He never lost a race in the 100 yard or 100 meter competitions.
WHat was his best time in the 100?
he broke the 100-yard dash record with a time of 9.1, a mark that would not be broken for eleven years.

Question: Who was his coach?
Self-contained rewrite: Who was Bob Hayes' coach?