Reno - Argentine Andres Romero fired a six-under 66 to take a wafer-thin one point lead over American Gary Woodland after two rounds of the Reno-Tahoe Open on Friday, in the PGA Tour's only event using the Stableford scoring system.
A bogey costs a player one point, double bogeys and worse three points.
No points are won or lost with par.
Northern Irishman Padraig Harrington, a three-time major winner including the 2008 PGA Championship, Canadian Mike Weir, the 2003 Masters champion and American Todd Hamilton, the 2004 British Open winner were among the big names to make the weekend.
Leading second-round scores on Friday in the US PGA Tour Reno-Tahoe Open (USA unless noted, scores based on Modified Stableford points system):
22 points - Andres Romero (ARG) 8-14
21 - Gary Woodland 14-7
19 - Stuart Appleby (AUS) 12-7, Rod Pampling (AUS) 2-17, Charlie Wi (KOR) 4-15
18 - Brian Harman 5-13, Colt Knost 12-6, Greg Chalmers (AUS) 13-5
17 - David Mathis 10-7, Robert Streb 7-10, David Toms 2-15, Bud Cauley 10-7
16 - Tom Gillis 6-10, James Driscoll 14-2, Brandt Jobe 8-8
15 - Josh Teater 15-0, Rory Sabbatini (RSA) 3-12, Johnson Wagner 4-11, Chris Williams 9-6, Luke List 0-15
14 - Dean Wilson 10-4, Chris DiMarco 6-8, Davis Love 2-12
13 - Brendan Steele 5-8, Michael Bradley 5-8, Will Claxton 8-5, Kevin Stadler 9-4
(Points awarded: 8 for double eagle, 5 for eagle, 2 for birdie, 0 for par, -1 for bogey and -3 for double bogey or worse)