Mike Weir takes three shot advantage - AT&T Pebble Beach National Pro-Am 2006

With a three-shot cushion heading into the third round of the Pebble Beach National Pro-Am, Mike Weir hopes he can somehow tame the tough course where errant shots clang off rows of trees and leads dissolve quickly.

The 2003 Masters champion shot a 5-under 67 at Poppy Hills on Friday to move to 14 under and overtake Donald for the lead. Weir's history at Spyglass -- the toughest of the tournament's trio of links -- is spotty at best.

"I haven't played Spyglass as well as the other two, that's for sure," Weir said.

The Canadian star hasn't been able to put his finger on the factors at Spyglass.

"I don't know. I haven't been able to pinpoint it, really. Some years, I haven't putted those greens very well. Other years, I haven't hit it well there," Weir said.

If Weir drains putts like he did on No. 8 Friday, he may tame Spyglass despite the confusion. An errant wedge left him about a 50-foot awkward look at the hole, his second-to-last after starting his round on the back nine.

"Had to putt through the fringe, bang, in the hole," Weir said. "It was just a lucky shot."

Aaron Oberholser, a 1998 graduate of nearby San Jose State, followed his first-round 65 with a 68 at Spyglass Hill to into second place at 11 under. He'll play Pebble Beach on Saturday.

Jonathan Byrd and Fredrik Jacobson matched Donald at 10 under.

After players basked in the sun a day earlier, the coastal fog rolled in Friday. Donald certainly felt it by the second tee, as the fog crept ashore while his foursome waited to hit.

"It got considerably colder and it was just hard to keep your hands warm, hard to keep your rhythm," Donald said.

A cold putter got the best of Donald, too.

"They're were a number of putts, which I would have hoped to have made, that I didn't make today," Donald said. "It was a grind out there on the greens and it got frustrating at times."

Donald scorched Spyglass Hill on Thursday, matching Mickelson's course record with a 62. But the Englishmen failed to capitalize on that quick start Friday and turned in an even-par 72, leaving him at 10 under.

A fortunate bounce off the rocks below the seawall on No. 18 saved Donald from a higher score. With 236 yards to the front of the green for his second shot, Donald pulled the ball left and it caromed off the rocks and into the bunker. He got up and down nicely from there for birdie.

Vijay Singh and Chris DiMarco looked to make up ground on Donald and Weir early at Spyglass Hill, but they came up short as the tough, tree-lined course challenged them to keep their drives straight.

Singh flinched first as the foursome began the round on the par-4 10th. He pulled his drive to the left, leaving him a second shot from the thick rough. He blasted out, but banged his shot off a nearby tree and left into an adjacent fairway. After a scramble, Singh missed his long par putt and bogeyed the hole.

Spyglass held Singh in check and he finished with an up-and-down 71. He was tied for 31st at 5 under.

DiMarco fared only slightly better, going out in even par and finishing with a 69 that left him tied for 11th at 7 under.

Mickelson was 3 under after his 74 at Spyglass Hill.