Conversation so far:
When did Phil Mickelson get his first championship?
Phil Mickelson's first major championship win came in his thirteenth year on the PGA Tour in 2004, when he secured victory in the Masters.
What happened during Phil Micelson's first major championship win on the PGA Tour in 2004 in the Masters?
Phil Mickelson secured victory in the Masters with an 18-foot (5.5 m) birdie putt on the final hole.

Question: What did he do next?
Self-contained rewrite: What did Phil Mickelson do next after first major championship win on the PGA Tour in 2004 in the Masters?