"You put it in the fairway. The game becomes a lot easier," Appleby said. "I drove it well, putted pretty good. But nothing fancy. Just good, solid golf."
South Africa's Trevor Immelman was 8 under after a 67.
The 26-year-old Immelman has missed the cut in his last four starts.
Mathias Gronberg was 7 under after a 69. He shot a 68 in blustery conditions on Thursday.
Australians Aaron Baddeley and Stephen Leaney were both at 6 under. Leaney had three holes to play on Saturday morning.
Two-time defending champion Vijay Singh was 4 under after a 71 that included a double bogey.
Michelle Wie has received a sponsor's exemption to play in the 84 Lumber Classic, giving the 16-year-old from Hawaii three starts on the men's US PGA Tour this year.
Wie, who has not made the cut in seven previous times competing against men, will be part of the 144-player field Sept. 14-17 at Nemacolin Woodlands Resort & Spa, 84 Lumber spokesman Jeff Nobers said Friday.
This will be the final year of the 84 Lumber Classic, which recently decided to give up its summer date on the new PGA Tour schedule that starts in 2007.
Wie has not made the cut in four starts on the PGA Tour. Her last attempt was in January at the Sony Open, where she missed by four shots after rounds of 79-68.
No woman has made the cut on the PGA Tour since Babe Zaharias in 1945.
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