John Huston shot his second consecutive round of 66 to hold a two-stroke lead at the halfway stage of the Southern Farm Bureau Classic.
Huston has been in good form here
Huston began the second round in a three-way tie for the lead and
ended it on 12-under par after a bogey-free round.
His first round co-leader Hidemichi Tanaka is second after recovering from a double bogey at the 10th to shoot five birdies on the back nine for a 68.
South Africa's Tim Clark and Chris Anderson both matched Huston's 66 to lie third on nine-under.
Britain's Luke Donald, the defending champion shot a 67 and is tied on eight-under along with Japan's Shigeki Maruyama and Paul Stankowski.
"I played probably better today than I did in my opening round," Huston admitted.
"I missed a couple of short birdie putts, but other than that I did putt pretty well. Everything was clicking pretty well."
The other first-round co-leader, Carlos Franco, fell off the pace with a 72 that left him six strokes back.