Two U.S. Open champions took aim at Tiger Woods (search) in the British Open, hoping to shave his commanding lead going into the third round Saturday.

Woods stumbled with a couple of early bogeys that kept his challengers within striking distance. The leader three-putted at No. 2 and drove into a bush at the sixth, forcing him to take a drop.

Retief Goosen (search), who has a pair of American titles, tapped in a 3-foot birdie at the 18th hole for a 6-under 66 that put him in the clubhouse just two strokes behind Woods.

Goosen was 9-under 207 through 54 holes. Now, the South African must avoid the sort of final-round meltdown that cost him a shot at his third U.S. Open victory three weeks ago — a three-stroke lead disappeared when he soared to an 81 on Sunday.

"It was just one of those things that happened," Goosen said. "I'd just like to give myself a chance every time on Sunday and hopefully one day it works out and you win again."

Goosen's collapse at Pinehurst No. 2 opened the door for Michael Campbell (search) to pull off a stunning victory. The New Zealander held off Woods for a two-stroke victory and was in contention again after shooting 68, leaving him at 209.

"It looks like Pinehurst revisited," Campbell said. "Goose is up there two shots in front of me, and there's Tiger and a bunch of guys."

Other challengers were lining up in case Woods faltered.

Jose Maria Olazabal, a two-time Masters champion, was 10 under after an eagle at No. 12. Scotsman Colin Montgomerie, cheered on by the home fans as he played alongside Woods in the final group, birdied the ninth to get to 9 under. Sergio Garcia rolled in a long eagle putt at the ninth, pumping his fist as his score dipped to 8 under.

John Daly, who won the 1995 British Open at St. Andrews, started the day with three straight birdies but dropped back with a couple of bogeys after the turn.

Woods teed off with a four-stroke lead. He had a couple of birdies and a nice par save at the eighth after his approach skidded through the green, but he wasted a birdie chance at the ninth after driving into the bushes again.

Woods opened with rounds of 66 and 67 for his largest 36-hole lead in a major since his magical run five years ago, which included a 19-under, eight-stroke victory at St. Andrews.

There was time for Woods to build on his lead, though the feared North Sea wind was rustling a bit on a warm, sunny afternoon. Early on, there were plenty of chances to go low as long as one avoided the 112 bunkers sprinkled throughout the fabled Scottish links.

Among the early starters, Soren Hansen of Denmark shot a 66, matching Woods' first-round score. Maarten Lafeber of the Netherlands and Darren Clarke of Northern Ireland cruised to 67s before Woods even teed off in the final group.

Everyone knew Woods would be difficult to catch, though he's not as dominating as he was on the way to his "Tiger Slam."

"Obviously, the whole tournament depends on Tiger," Clarke said. "If he's going well, it's going to be very difficult for Monty or anyone else to catch him."