Day had an MRI in Miami on Wednesday that was negative but
the doctor prescribed rest if he was unable to play.
"My left thumb was bothering me at the WGC-Accenture Match Play
Championship and the pain continued here this week," Day said in
a statement. "My plan is to rest for a couple of weeks."
Day, who clinched the biggest title of his career two weeks ago
at the WGC-Accenture Match Play Championship, arrived at Doral
as one a favorite to win the $9 million WGC-Cadillac.
Partnered with Northern Irishman Rory McIlroy and 2009 Doral
winner Phil Mickelson, Day pulled out just prior to teeing off
and will now focus on getting fit for the April 10-13 Masters,
the year's first major.
(Reporting by Steve Keating in Doral;
editing by Frank Pingue)
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