A 3-under 69 left Duffy Waldorf with a four-shot lead at 197 over Billy Mayfair after three rounds of the wind-blown Las Vegas Invitational.
Fred Couples was tied with Kevin Sutherland another shot back.
Defending champion Tiger Woods, who double-bogeyed two holes on his front side after flubbing shots around the green, shot a 5-over 77 and was 12 shots back. Former Pullman resident Kirk Triplett made the cut, shooting a 76 for a total of 211.
Bob Eastwood, continuing the finest season of his career, shot a 5-under-par 67 in a strong, steady wind for a two-stroke lead over five players in the first round of the Raley’s Senior Gold Rush in El Dorado Hills, Calif.