Conversation so far:
When did Phil Mickelson get Phil Mickelson's first championship?
In November 2004.
What happened during the win?
CANNOTANSWER.
What did he do next?
The following year, Mickelson captured his second major at the PGA Championship.
How did he play?
On the 18th hole, Mickelson hit one of his trademark soft pitches from deep greenside rough to within a 18 inches.
When did he get his third win?
The following year.
Where was he playing?
at Baltusrol.
What happened with the last win?
He won his second green jacket after shooting a 3-under-par final round, winning by two strokes over runner-up Tim Clark.

Question: Was this an important win for his career?
Self-contained rewrite: Was the event at Baltusrol an important win for Phil Mickelson's career?