Don't bite on McIlroy +310 (give or take) as insurance to the Woods wager. If Tiger plays well tomorrow, chances are you'll still have the same value or better on McIlroy. I've already talked to a couple of people with Tiger TO WIN at 10-1 and they were going to back it up with McIlroy +310ish.
Just wait. Tiger will be hovering around the top after 54 holes and they'll be great value on others.
Wait.