Returning in the morning chill Sunday, McIlroy hit a beautiful lag from 60 feet that set up a birdie on the par-5 first hole. Casey hit a 3-wood onto the green, except that it went just over the back into a sticky lie in the rough.
His first chip didn't reach the green. His next chip was short. He had McIlroy putt from just over 2 feet for the No. 1 player to advance.
Casey became ill overnight and said it affected him only when looking down at his ball in the rough.