BOISE, Idaho Russell Knox shot the fifth 59 in Web.com Tour history Friday, missing a chance to break the tour record when he parred the final two holes in the second round of the Boise Open.
The 28-year-old Scot had two eagles and eight birdies in his bogey-free round at 6,807-yard, par-71 Hillcrest Country Club. He made a 7-foot par putt on his final hole, the par-4 ninth.
"I told myself I had no choice but to make this putt," Knox said. "Missing wasn't an option. I'd convinced myself that I'd already made it. It was right in the middle.
Never in doubt."
Knox is the second Web.com Tour player in two weeks to shoot 59, following Will Wilcox in the Utah Championship. Notah Begay III had a 59 in the 1998 Dominion Open, Doug Dunakey accomplished the feat in the 1998 Miami Valley Open, and Jason Gore did it in the 2005 Cox Classic.
Knox finished the round with a one-stroke lead at 13-over-par 128.
"There's still a million different things that can happen over the weekend," Knox said. "Obviously, no one can ever take this round away from me. But I came here to win a tournament, not shoot 59. It's a nice bonus, and it'd sure be nice to do both."
Erik Flores of Grass Valley was tied for fifth place after shooting an 8-under 63 for a total of 12-under 130 through two rounds. Spencer Levin of Sacramento shot a 6-under 65 for a total of 10-under 132 and was tied for 14th.
PGA Tour in Oakville, Ontario Hunter Mahan birdied the final three holes for an 8-under 64 and a two-stroke lead after the second round of the Canadian Open.
Coming off a ninth-place tie last week in the British Open, the five-time PGA Tour winner had eight birdies in his bogey-free round at Glen Abbey to reach 13-under 131.
"I kind of built off last week," Mahan said. "I got some good things I'm doing with my swing and everything, and feel good about that. I'm just going out there and really trying to trust my game."
John Merrick was second after a 62.
He tied the course record set by Leonard Thompson in 1981 and matched by Andy Bean in 1983 both when Glen Abbey played to a par of 71 and Greg Norman in 1986. Merrick had an eagle and 10 birdies, playing the back nine in 6-under 31.
Senior British Open in Southport, England Mark Wiebe of the United States shot a 5-under 65 to share the lead with Bernhard Langer after the second round at Royal Birkdale.
Wiebe had four birdies on the back nine. Langer, the 2010 champion at Carnoustie, shot a 67 and made five birdies. Both players finished at 5-under 135.
U.S. Junior Amateur in Truckee Scottie Scheffler and Davis Riley won quarterfinal and semifinal matches at Martis Camp Club to advance to the 36-hole final.
Scheffler, 17, of Dallas, won three matches, finishing off Justin Suh of San Jose in 19 holes in the suspended third round, then beating P.J. Samiere of Kailua, Hawaii, 3 and 2 in the quarterfinals, and Doug Ghim of Arlington Heights, Ill., 6 and 4 in the semifinals.
U.S. Girls' Junior Amateur in Fort Wayne, Ind. Lakareber Abe moved into position to become the first black female player to win a United States Golf Association individual championship, winning two matches to advance to the 36-hole final.
Abe, 17, from Angleton, Texas, beat Kathleen Scavo of Benicia 4 and 3 in the quarterfinals, and topped Bethany Wu of Diamond Bar 1 up in the semifinals.
Abe will face Gabriella Then of Upland in the final today.
Casie Cathrea of Livermore lost to Wu 4 and 3 in the quarterfinals.