Conversation so far:
What are Phil first three major wins?
first major championship win came in his thirteenth year on the PGA.
When did that happen?
2004, when he secured victory in the Masters with an 18-foot (5.5 m) birdie putt on the final hole.
What are the other wins that he had?
The following year, Mickelson captured his second major at the PGA Championship at Baltusrol.

Question: Who were his opponent at the match?
Self-contained rewrite: Who were Phil Mickelson opponent at the match?