SAN FRANCISCO (AP) -- Rory McIlroy arrived at Harding Park on Monday knowing he'll be at the Match Play Championship at least until Friday.
So will the rest of the 64-man field.
In a format change to avoid the single elimination that often sent big names home early, the Match Play will be round robin featuring 16 groups of four players. The best record from each group advances to the round of 16 on Saturday morning for a full weekend of golf.
There was one more twist. The groups were based on a lottery.