Jim Furyk battled for a 2-under 69 on Saturday and is now one shot clear of the field after three rounds of the BMW Championship.
Coming off the sixth 59 in PGA Tour history, Furyk ended 54 holes at 13-under- par 200.
Furyk, the 2009 runner-up, will go for his 17th PGA Tour title on Sunday.
Steve Stricker rallied into contention with a 7-under 64. He jumped into second place at minus-12 at Conway Farms. Brandt Snedeker, who shared the second-round lead with Furyk, managed an even-par 71. Snedeker is alone in third at 11-under 202.
Zach Johnson carded a 2-under 69 on Saturday and is by himself in fourth at minus-10.
Tiger Woods, a five-time winner of this event, birdied six of seven holes from the sixth en route to a 5-under 66. He stands alone in fifth at 9-under 204.
"I had a nice little run to at least get myself in there where I have a chance tomorrow," Woods stated.
Furyk and Snedeker shared the lead at the start of the day, but Snedeker bogeyed three of four holes from the second to fall two behind Furyk, who dropped a shot at the fourth.
Snedeker got back within one when he drained a 30-footer for birdie at the sixth. Furyk responded with a 7-foot birdie effort on No. 7. The duo again traded birdies at nine and 10 with Snedeker making a 13-foot putt at nine and Furyk answering with a short putt at 10.
Furyk made it two in a row at the 11th as he poured in a 24-foot birdie try on the par-3. He led Snedeker by three at that point, but Stricker was suddenly one back.
Stricker had five birdies through 14 holes. He holed a wedge shot for eagle on the par-4 15th to jump to 12-under, where he was one back.
Furyk pushed his lead to two with a 4-foot birdie putt at 15. Stricker dropped a shot at 17, but closed with a birdie at 18 to finish at 12-under.
"I had a number in mind to start the day, which I typically don't do. Came up a little short, but all in all it was a good day," Stricker stated. "I've holed out a few wedges over my career, but I don't know if any of them slam- dunked in that like. It's a shock to see something like that go in."
After a pair of pars, Furyk 3-putted for bogey at the last to trim his lead to one over Stricker.
"I guess I said yesterday leaving here that the goal was to go out and shoot a good number today, get myself in position to win this golf tournament. It could have been better out there," Furyk said in the press room. "Obviously dropped that shot at 18, which I'm disappointed, it was probably one of the easier holes of the day scoring wise. But I've got myself in good position, so rather than harp on the last hole, I'd probably tend to want to think about tomorrow and what I have to do to try to win a golf tournament."
Snedeker birdied the 12th, but gave that right back as he bogeyed the 13th. He parred four in a row before closing with a birdie at the last to end two back.
Defending champion Rory McIlroy closed with an eagle for a 3-under 68. However, he is in 68th place at 10-over 223.
NOTES: Furyk's tee shot at 18 missed the fairway and that was his first missed fairway since the first round ... Hunter Mahan had a hole-in-one on the par-3 17th ... Furyk has lost the last five tournaments in which he owned the 54- hole lead, and has won only nine of the 22 times his has been in that position in his PGA Tour career ... Though rain is in the forecast for Sunday, tee times were not adjusted.