Conversation so far:
what happened to Joe Frazier in the summer olympics?
In 1964 heavyweight representative Buster Mathis qualified but was injured so Joe Frazier was sent as a replacement.
how was Buster Mathis injured?
He injured his hand.
Are there any other interesting aspects about Joe Frazier?
Once, Joe Frazier battled Jerry Quarry in Madison Square Garden.
did Joe Frazier win his fight against Jerry Quarry?
Joe Frazier won the fight in the fifth round with a strong left hook to the ribs.

Question: what did he go on to do after this victory?
Self-contained rewrite: what did Joe Frazier go on to do after his victory over Jerry Quarry?