Los Angeles:Phil Mickelson has managed to maintain a one-shot lead in the Nissan Open on Saturday. Mickelson got up-and-down for birdie on the par-5 17th and shot 2-under 69 in the steamy sunshine at Riviera, giving him a one-shot lead over Padraig Harrington (70) as he tries to win for the second straight week. "I was tied for the lead yesterday. I've got a one-shot lead today. So, it's getting better. It wasn't the lead I wanted, but it's getting better," said Mickelson, who was at 13-under 200. Mickelson will be in the final group with Harrington and Rich Beem, who delivered the theatrics by making a hole-in-one on the 14th hole that sent him leaping atop the red sports car that he won for his ace. More than getting a new car, Beem suddenly has a chance at his first trophy since the 2002 US PGA Championship at Hazeltine, as he shot the best round of the day, a 6-under 65, and was only two shots behind. "I was thinking I won a car, and it was going to cost me an awful lot in the bar later on. I wasn't thinking about picking up two shots on the field or anything," Beem said of his ace, a 7-iron from 179 yards that took a high hop and plunged into the cup. Former Nissan Open champion Robert Allenby (68) and Charles Howell III (69) were another shot behind, setting up a typical Sunday off Sunset Boulevard when several players have a chance.