Norton, MA -- (Sports Network) - Mike Weir narrowly missed carding a 59 on Friday, but his four-under 67 Sunday gave him a one-shot lead after three rounds of the Deutsche Bank Championship.

Weir's three-day total of 17-under-par 196 established a new 54-hole scoring record at this event. The Canadian broke Adam Scott's record of 198, which he set in 2003.

Camilo Villegas started the day tied for 22nd, but flew into second place with an eight-under 63. He completed three rounds at 16-under-par 197.

Sergio Garcia (68) and Vijay Singh (69) share third at minus-14. Singh, the FedEx Cup playoff points leader, won this title in 2004 and was runner-up in 2006.

Second-round leader Tim Clark, who had a shot at 59 on Saturday, stumbled to six bogeys in a nine-hole span, but birdied the final two holes to post two- over 73. That left him tied for eighth at 12-under-par 201.

Clark had a two-stroke lead after seven holes, but a three-putt bogey on the eighth sent him tumbling out of the lead at the TPC of Boston.

Villegas was playing nearly two hours ahead of the final pairing - Weir and Clark. He spread his birdies throughout the front and back nines.

The Colombian collected birdies on the second and fourth to open his round. Birdies on six and nine helped him make the turn at 12-under.

Villegas sank an eight-footer for birdie on the 12th and came back two holes later with a 10-foot birdie putt at 14.

After a pair of pars, Villegas dropped his approach within two feet at the 17th and kicked that in for birdie. That gave him a share of the lead with Clark.

Villegas followed with a 10-foot birdie putt at the last to give him a one- shot lead on Weir, who would pass him thanks to three birdies in his final five holes.

Weir birdied the second, but gave that shot back as he bogeyed the sixth. He bounced back with an eight-foot birdie putt on No. 7.

Around the turn, Weir drained a seven-foot birdie putt at 10 to join Villegas atop the leaderboard. After Villegas birdied the last, Weir again tied him for the lead with a birdie at 14.

Weir made it two in a row as he chipped in for birdie at the 15th. He dropped back into a share of the lead with a bogey on the 17th. Weir bounced back with a birdie at the last from five feet out to take the third-round lead.

"I've got to play my game," said Weir of the final round. "Today was not textbook. I did not play great. I had to lean on my short game. Hopefully that was my bad ball-striking day. I am proud of that round because I felt a little off all day. I held in there well, especially with my short game."

The lead might not be where Weir wants to be though. Weir has won just once in nine tries with the 54-hole lead and that was at the 2004 Northern Trust Open. He has lost his last three events when holding the 54-hole lead, including the Mercedes-Benz Championship earlier this year.

Villegas missed the cut for just the third time this season last week. He has four top-10 finishes, including a tie for fourth at the PGA Championship.

"I've been playing pretty solid all year. If you look at it, last week was just my third missed cut of the year and the way the points are right now, it was probably the worst cut to miss all year," said Villegas, referring to the FedEx Cup playoff race.

"I'm very excited with the way I played today to get back into contention and back into this tournament."

Ernie Els (69), Jim Furyk (69) and Ben Crane (63) are tied for fifth at 13- under-par 200. Clark was joined in eighth at minus-12 by Heath Slocum (69) and Briny Baird (68).

There was a second cut at three-under-par 210 with 14 players missing out on the final round. Among those 14 were 2007 champion Phil Mickelson, who shot one-over 72 to finish at 211, Adam Scott (211) and Kenny Perry (213).