Garrett Willis came within a whisker of the course record at TPC Summerlin as he shot a sparkling 62 to move into a share of the lead after the second round of the Frys.com Open.
The 33-year-old from North Carolina came within a shot of matching Davis Love III who posted a 61 back in 2001, and finished the day tied with DJ Trahan and George McNeill on -13, both of whom played at the neighbouring TPC Canyons.
The trio stand one shot clear of Jason Gore and John Huston, while Nick Watney is all on his own in sixth on -11.
Willis, who has fluctuated between the PGA Tour and the Nationwide Tour for the last three years, admitted he feared the worst on Friday when he arrived at the course later than scheduled.
"I got a slow start out of the hotel this morning," he stated. "When you have a 7:10 tee time and you're staying in Vegas it's tough to get to bed at a decent hour.
"I only warmed up for about 20 minutes prior to the round. I hit the first fairway and was pretty pleased but bogeyed the second hole and my first thought was: 'Great, you put yourself in a position where you'll have to grind it out for the cut'."
Starting at the tenth, Willis bogeyed the 11th, but hit back with birdie at 12 and picked up three more shots to reach the turn in 33 strokes.
Willis then raced home in just 29 shots as he scorched up the leaderboard with a further five birdies and an eagle at the par-five third.
John Daly came close to matching Willis' heroics as he carded a superb 63, covering his back nine in just 28 shots.
The big-hitting American, who managed ten birdies and an eagle during his round, now stands at six-under following his first-round 74.