"Right where I want to be," Scott said. "The guys shot some unbelievably good scores out there today, so I knew on that back nine as I was kind of falling a long way behind, I needed to step it up, and I was happy the putter really came through for me. Tomorrow, I'm just going to have to be really sharp, because there's no doubt again there are going to be low scores out there."
Peter Hanson, who reached the quarterfinals of the Match Play Championship, took another step toward trying to secure a PGA Tour card. He had a 65 and was alone in fourth in this World Golf Championship.
Thomas Bjorn has yet to make a bogey in 36 holes and had another 68. He was four shots behind, tied with PGA champion Keegan Bradley, who had a 67. The group at 7-under 137 included Masters champion Charl Schwartzel and former PGA champion Martin Kaymer.
"You'll take that any week," Bjorn said. "I'm not making a big number of birdies, obviously, but when you can keep big mistakes off your scorecard, that's the key to this golf course. It's very easy to make some big mistakes and it's difficult to get it back."
Phil Mickelson was 1 under after a 71.
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