Pebble Beach, CA -- Vijay Singh posted a four-under 68 on Saturday to share the third-round lead with Arron Oberholser at the Pebble Beach National Pro-Am. Oberholser carded a flawless five-under 67 to join Singh at 13-under-par 203.

Play rotated over Pebble Beach Golf Links, Spyglass Hill Golf Course and the Poppy Hills Golf Course for the first three rounds. After the 54-hole cut, Pebble Beach hosts Sunday's final round.

Welshman Phillip Price, best known for clobbering Phil Mickelson in a singles match at the 2002 Ryder Cup, shot a three-under 69 at Pebble Beach to move to 10-under-par 206.

Price was joined by second-round leader Luke Donald, who managed an even-par 72 at Poppy Hills, and Jeff Maggert, who posted a five-under 67 at Pebble Beach, in a tie for third.

Mickelson held the lead during Saturday's third round but struggled on the back nine at Pebble Beach. He made two bogeys en route to a one-under 71 and sixth place alone at minus-nine.

Singh, who has 11 consecutive top-10 finishes and is ranked second in the world, played Pebble Beach on Saturday. He started very poorly with a pair of bogeys in his first two holes but erased the mishaps with two short birdies at five and seven.

The Fijian dropped another stroke to par at the eighth but rebounded with a birdie at the par-four 11th. Singh ran home an uphill 10-footer for birdie at the 12th to earn a share of first place for the first time.

At the par-five 14th, Singh threw his third past the hole but the spin took the ball 25 feet short of the cup. He sank that long putt and added a 10- footer at the next to go one clear of Oberholser.

Singh tried to cut the fairway at the 16th and landed in the right fringe. He played his second to 30 feet and sank the birdie putt to go to minus-13 on his round.

Standing at the famous closing hole at Pebble Beach, Singh needed a birdie to match Don Pohl's 1980 back-nine record of 30. He laid up with his second shot and knocked his third to six feet. Singh missed the birdie putt but is in position for win No. 1 of the 2004 PGA Tour season.

"I think it's the momentum that keeps you going," said Singh. "You feel like you are going to make birdies. You make one and you say, 'okay, lets go make another one. If you make good shots, you are going to make putts."

Oberholser, who is in search of his first career victory on the PGA Tour, played Spyglass on Saturday and collected a pair of birdies over his first nine holes.

The 29-year-old added a birdie at the 10th and another at the par-three 12th. Oberholser then birdied the par-three 15th to complete a bogey-free round and grab his share of first.

Bill Glasson fired a six-under 66 at Poppy Hills to join Tom Pernice, Jr., K.J. Choi and Scott McCarron at eight-under-par 208.

Reigning Masters champion Mike Weir was one shot further back along with Kirk Triplett and Brian Bateman at seven-under-par 209.

The 54-hole cut fell at one-under-par 215 with 68 players qualifying for Sunday's final round. Among those who failed to make the grade were last year's champion Davis Love III, Brad Faxon and five-time Pebble Beach winner Mark O'Meara.