Daniel Summerhays and Tim Herron were 11 under. Summerhays had a 63, and Herron shot 68.
John Daly was 10 under after a 63, his lowest score of the year. At 132nd on the money list, the two-time major champion is trying to move into the top 125 to secure full playing privileges for next season. He had eight birdies, an eagle and two bogeys to match Summerhays for the best round of the day.
"Today, I hit the ball really well and I putted good the last two days, which is good for me," Daly said. "The greens are rolling really good, so it gives you an opportunity. If you hit it think decent, you can make some putts. ... But on any tour, any more, it's just putting. If you make some putts you can play really well. This course gives you a lot more opportunities than most courses."
Vijay Singh, Nick Watney, Chris Kirk and John Huh also were 10 under. Singh and Watney shot 66, Kirk had a 68, and Huh a 69.
Watney also lives in the area.
"It's fun. It's nice to play well at home," Watney said. "I got a lot of friends and family out, so I'm looking forward to trying to put together a nice weekend."
Singh had five birdies, an eagle and a double bogey on his final hole, the 444-yard, par-4 18th.
"I putted better today," Singh said. "I made some putts and had some good up and downs, and I made a bomb on No. 13 for eagle, so it kind of helps."
Defending champion Kevin Na was 8 under after a 66.
"I feel like I left a few out there, but on this course it's easy to do," he said.
Casey Martin missed the cut with rounds of 71 and 74. The Oregon coach, playing on a sponsor exemption, is allowed to use a cart in competition because of a rare circulatory disorder in his right leg.