Potomac, MD (Betting Express) - Adam Scott posted a four-under 67 on Saturday to take a commanding six-stroke lead after three rounds of the Booz Allen Classic. Scott completed 54 holes at 18-under-par 195.

Olin Browne stands alone in second place at 12-under-par 201 after a third- round 71. Charles Howell III and Arron Oberholser share third place at 11- under-par 202. Kevin Na, Rich Beem and defending champion Rory Sabbatini are one stroke further back at minus-10.

Scott, who established a new 36-hole scoring record of 14-under 128, tied the 54-hole mark that Hal Sutton set in 1991.

The 23-year-old Australian had an up-and-down front nine. He dropped in a birdie at the second, but gave that stroke back with a bogey at the fourth.

Scott came back with a birdie at the sixth and another at the eighth to get to 16-under. He faltered to his second bogey of the round at the ninth. Scott, though, bounced right back to birdie No. 10.

The 2004 Players Championship winner dropped in back-to-back birdies from the 13th to climb to 18-under. Scott stumbled to his third and final bogey at the par-four 15th. He erased that mistake with a birdie at the 18th to take a six- stroke cushion into the final round at the TPC at Avenel.

"It was playing tough at the end, and I just managed to hang on," said Scott. "And it seemed like a few of the other guys stumbled over the line."

Scott has held the lead twice before after 54 holes on the PGA Tour and has won both events. At the Players Championship, he outdueled Irishman Padraig Harrington by one shot for the win. Before that, Scott cruised to a four- stroke win at the 2003 Deutsche Bank Championship.

"I feel like it's quite good to get the field thinking that way and hopefully go out and do it again tomorrow and just get in their head a little bit," said Scott, of any psychological advantage he may have over players with his length. "Tiger Woods did it unbelievably well. I think it's pretty hard to catch up out here, especially if the wind is blowing. But even if someone does come at me, I think I'm playing well enough that I can hold them off."

Browne seemed as though he would keep pace with Scott, but he stumbled down the stretch. Browne managed a birdie at the par-four fourth, to go along with eight pars on his opening nine.

The 45-year-old Browne climbed to 14-under with a birdie at the 11th. However, he faltered to bogeys at 16 and 18 to fall six back of Scott.

"The back nine was more difficult than it has been this week," said Browne. "The wind started swirling and got things significantly harder on about 12 or 13. It became difficult because the greens firmed up. I played pretty solid today though."

Beem, the 2002 PGA Champion and winner here in 1999, briefly climbed into a tie for the lead with Scott, but things went downhill from there. Beem picked up three birdies on the front nine to get to minus-14.

He then dropped in a birdie at the 11th to tie Scott atop the leaderboard. Beem, however, struggled to four straight bogeys from the 12th and dropped another stroke at the 17th to slide eight shots behind Scott.

Duffy Waldorf, who shared second place here last year, fired a six-under 66 to move to nine-under-par 204. He is joined there by Tom Lehman and Alex Cejka.

Reigning PGA Championship winner Shaun Micheel leads a group one stroke further back at minus-eight. Also at eight-under par are Bo Van Pelt, Tim Herron, Jeff Sluman, Michael Bradley and Bart Bryant.