Corey Pavin fired a course-record 66 Friday and opened a three-stroke lead after two rounds of the ANZ Players Championship in Brisbane, Australia, with a 135 total.
Todd Demsey, another American, shot a 68 and was tied for second with Australian David McKenzie at 138.
Pavin, the 1995 U.S. Open winner, hasn't won since the 1996 Colonial Classic.
ZIMBABWE OPEN: Nick Price fired a 4-under-par 68 on a course he redesigned and moved into a three-way tie for the lead in the Zimbabwe Open in Harare.
Price, the local favorite, joined South Africans Tjaart van der Walt and Warren Abery at 137, 7-under par. Van der Walt had the lead to himself going into the round but shot a 71.
"I actually played better than my 68 and if I could have read the breaks on the greens I would have had a lower score," said Price who is trying to win his country's open title for the third time.
HONG KONG OPEN: Anthony Wall of England fired a 6-under-par 65 Friday to take a one-stroke lead over Taiwan's Hsieh Chin-sheng after the second round of the Hong Kong Open.
Wall, a 23-year-old European Tour rookie, had seven birdies and one bogey en route to a 36-hole total of 133.
Hsieh, the leader going into the round, shot a 70.
American Mark Brooks had his second straight 68 and was tied for third with Taiwan's Wang Ter-chang at 136.
John Daly shot a 72 to drop to 13th place at 138.
CASIO WORLD OPEN: Tiger Woods fell six strokes off the lead in the Casio World Open in Ibusuki, Japan, when he bogeyed four straight holes and shot a 2-over-par 74 in the second round.
Hidemichi Tanaka, winner of the Japan Open, moved into first place at 137 with a 69.
First-round leader Joe Ozaki, the youngest of three Ozaki brothers on the Japan tour, shot a 71 to share second place at 138 with Toshimitsu Izawa, who had a 69.
Brian Watts shot a 70 to join fellow American Paul Stankowski and Nobumitsu Yuhara at 139. Stankowski, the 1996 winner, shot a 71, and Yuhara had a 70.
"I don't know what the cause was, but I wasn't satisfied with my shots off the tee or my approaches," said Woods, who began the bogey run on the sixth hole with wind and rain making play difficult.
"I'm just going to come back tomorrow and play aggressive and hope that I can get four straight birdies instead of four bogeys. I'd hate to finish the weekend playing like I did today."
Woods, making his first appearance on the Japan PGA Tour, chipped in from 40 yards for birdie on No. 1 and also birdied No. 18 to finish at 1-under 143 on Ibusuki Golf Club's Kaimon course.
JAPAN SENIOR OPEN: Defending champion Isao Aoki and Australia's Graham Marsh shot 7-under-par 65s to share the first-round lead in the Japan PGA Senior Open in Sadohara.
Aoki, an eight-time winner on U.S. Senior PGA Tour, had an eagle and five birdies on the Ube Country Club course. Marsh, a five-time champion on the U.S. tour, had seven birdies -- including three straight on Nos. 10-12.
Japan's Fumio Tanaka was third after a 68.
NYUGYO CUP: Kaori Harada took a two-stroke lead after two rounds of the Meiji Nyugyo Cup in Sadohara, Japan, the Japan LPGA Tour's season finale, on Friday. She shot a 7-under-par 65 to reach the 36-hole mark with a 134 total.
South Korea's Lee Young-me turned in a 67 for 136, and was one stroke ahead of another South Korean, Lee Oh-soon, who shot a 69.