Jim Furyk played a bogey-less front nine with one birdie on the par-5 second hole and now holds a three-stroke lead over Louis Oosthuizen, who is one under for the day through 12holes.
Keegan Bradley and Steve Stricker are tied for third at -7. Stricker has birdied three of the last six holes (Nos. 8-13).
Jason Dufner and Luke Donald are each at -6 for the tournament. Rory McIlroy stands at -5 and is walking onto the 16th tee.
Branden Grace made an early charge with a five-under front-9 (30 strokes) but went +1 over the back-9. He's -2 for the tournament and two strokes ahead his playing partner for the third straight day, Tiger Woods.