James Driscoll shot a 9-under 63 on Thursday in the PGA Tour's Puerto Rico Open, missing a chance to break 60 when he played the final four holes in 2 over.
Driscoll eagled the par-5 fifth — his 14th hole of the day — to reach 11 under, but dropped strokes on the par-4 seventh and par-3 eighth at Trump International Golf Club-Puerto Rico. He had 10 birdies in a 12-hole stretch from No. 12 to No. 3 and ended up with a two-stroke lead over Will MacKenzie.
"I was 11 under with three to play, so I mean anything could have happened," Driscoll said. "If I birdied all three holes or two of them, I could have shot in the 50s, but they were tough holes.
"The seventh hole is a pretty tough hole. I hit a good shot, made bogey, unfortunately kind of got a bad kick, but then the eighth hole I hit it solid, but I pulled it in the hazard and made bogey there. So with three holes to go, definitely could have been lower, but I got a few lucky breaks out there, too, so I'm not really looking back thinking that it should have been a lot lower. But it could have been."
Driscoll matched the course record set by Derek Lamely in the third round of his victory last year.
John Daly rallied to shoot a 70. He was 4 over after six holes.
Lamely had seven bogeys in a 76.
Mike Weir (wrist) and Boo Weekley (hand) withdrew during the round. Weir was coming off a career-worst 85 in the second round of the Honda Classic. He has shot 77s in his other three tour rounds this year.