Rod Pampling shot an 11-under 60 on Thursday in the Shriners Hospitals for Children Open, missing a chance for a 59 when he parred the final two holes.
The 47-year-old Australian had two eagles and seven birdies in his morning round to match the TPC Summerlin record. He left a 22-footer short on the par-3 17th, and missed from 18 feet on the par-4 18th.
Brooks Koepka and John Huh shot 62, and Billy Horschel had a 64.
Pampling hit a 3-iron for a tap-in eagle on the par-5 16th.
Pampling had the lowest score in his PGA Tour career that features two victories. He had a 10-under 61 late last year in the final round of the Australian Open.