Louis Oosthuizen looked like he might relinquish his one-stroke lead after his approach shot on the par-5 13th bounced off the green, but a spectacular chip shot had just a little bit too much pace. He's two clear of Lee Westwood, Matt Kuchar and Bubba Watson, his partner for the day, who left an eagle shot on the 13th well short but birdied the hole.
Oosthuizen found himself on the fringe on 13, when he busted shot a long chip that had just a little tiny bit too much pace on it.
He finished the hole with a simple birdie to extend his lead.
If it's any help, college basketball guru Ken Pomeroy gave Oosthuizen a 60 percent chance of victory after the birdie, and, well, he's always right. So listen to him.