Ryan Moore matched the course record with a 10-under 61 on Thursday in the first round of the Justin Timberlake Shriners Hospitals for Children Open in Las Vegas.
The former UNLV player had nine birdies, an eagle -- on the 341-yard, par-4 15th -- and a bogey in perfect conditions at TPC Summerlin to take a one-stroke lead in the Fall Series opener.
"Just one of those nice days," Moore said. "Got off to a great start. Kind of 7 under on the front nine and just kind of cruised the next nine. Made bogey on my 17th hole, No. 8. It was great to bounce back with a birdie on the ninth hole."
Brendon de Jonge had a 62, and Tim Herron and John Huh shot 63.
Moore tied the course mark held by Davis Love III (2001), Tag Ridings (2004) and Hunter Haas (2011).
"I had no idea that was the course record, so that's nice," said Moore, who won the 2009 Wyndham Championship for his lone PGA Tour title.
Heart transplant recipient Erik Compton had a 66, and Casey Martin shot a 71. 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.
European Tour: Branden Grace made five closing birdies to shoot a course record 12-under 60 in the first round of the Dunhill Links Championship.
The South African, who has won three tour events this year, took full advantage of the scoring conditions at Kingsbarns (Ireland), one of three courses hosting the event.
While no player has recorded a 59 in the 40-year history of the tour, Grace is the 15th player to shoot 60. "It could have been a 59, and I said to my caddie when I hit it stiff on 18 that it could be close to a 59," he said. "I had some opportunities, but I never really made anything long."
Victor Dubuisson shot a course record 10-under 62 on Old Course at St. Andrews, despite dropping a shot at No. 16.
The lowest round at Carnoustie was 67, shared by Oliver Wilson and Gregory Havret.
Four Ryder Cup players struggled at Carnoustie. Martin Kaymer shot 70, American Dustin Johnson and Peter Hanson had 72s, and Paul Lawrie had a 75.
Champions Tour: Tom Lehman, the Charles Schwab Cup leader, isn't playing in the SAS Championship, which begins Friday in Cary, N.C.
Web.com Tour: Jason Gore, the tour's all-time win leader with seven, opened with a 7-under 63 to take a two-shot lead at the Neediest Kids Championship. Alistair Presnell, Michael Connell and Will Wilcox shared second at the TPC Potomac at Avenel Farm (Md). Josh Persons was 5 under through 17 holes but failed to finish because of darkness.
Etc.: Paul Simson won the USGA Senior Amateur for the second time in three years, beating Curtis Skinner 4 and 3 at Mountain Ridge Country Club (N.J.). Simson ousted Sunnyvale's Jim Knoll 3 and 2 in Wednesday's semifinals.
Wire services contributed to this report.