Conversation so far:
When was Phil Mickelson's first win?
Mickelson's first major championship win came in his thirteenth year on the PGA Tour in 2004.
What was his second win?
second major at the PGA Championship at Baltusrol, in a Monday final-round conclusion.

Question: What was his 3rd major win?
Self-contained rewrite: What was Phil Mickelson 3rd major win?