The record for the lowest 18-hole score on the PGA Tour is 59. This score has been posted three times in tour history:
- Al Geiberger: 1977 Memphis Classic (29-30), Colonial Country Club (par 72)
- Chip Beck: 1991 Las Vegas Invitational (30-29), Sunrise Golf Club (par 72)
- David Duval: 1999 Bob Hope Chrysler Classic (31-28), PGA West (Palmer Course) (par 72)
