Hunter Martin, Getty Images
Mike Weir lines up a shot during Saturday's second round of the Deutsche Bank Championship. Weir shot a 68 and trails the leader by one shot.

NORTON, Mass. — Tim Clark needed only one birdie over his final two holes to shoot 59. He finished with consecutive bogeys and had to settle for a one-shot lead Saturday in the Deutsche Bank Championship.

He still matched his career low with a 9-under 62 on soft and vulnerable TPC Boston, giving him a one-shot lead over Mike Weir of Canada at the halfway point of the PGA Tour's second playoff event.

"It just was strange," Clark said. "I felt good all day and just kept making birdie after birdie after birdie. And then on the front nine, a couple of eagles really boosted the round. For a while there, there certainly was a chance of 59."

On another day of lowing scoring, Clark was trying to get into contention when he shot to the top of the leaderboard by playing a six-hole stretch in 7 under, including two eagles. After a wedge to 3 feet on the par-5 seventh put the South African at 11 under for the round with two holes to play, it all fell apart.

Clark missed the green on the par-3 eighth and failed to convert an 8-foot par putt.

"That was the end of the dream," Clark said.

He missed the ninth fairway, watched his approach bound through the green and he missed his 10-foot par putt for a 62, putting him at 14-under 128.

Weir, who tied the course record Friday with a 61, took a while to warm up until he settled in for a 68. He prefers a stiffer test, but the former Masters champion has won at places like the Bob Hope Classic.

"I'm going to have to do a little better," Weir said.

JOHNNIE WALKER CHAMPIONSHIP: At Gleneagles, Scotland, France's Gregory Havret birdied the last hole for a 4-under 69 and a one-stroke lead over England's Anthony Wall after the third round of the Johnnie Walker Championship.