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Pro Goes Low at Boise: 59

Boise, Idaho — Russell Knox shot the fifth 59 in Web.com Tour history Friday, missing a chance to break the tour record when he settled for pars on 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.

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 had a one-stroke lead at 13 over after opening with a 69 on Thursday.

Mahan Leads in Canada

Oakville, Ontario — Hunter Mahan birdied the final three holes Friday 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.

Wiebe, Langer
Ahead at Open

Southport, England — American Mark Wiebe shot at 5-under 65 at Royal Birkdale for a share of the lead with Germany’s Bernhard Langer after the second round of the Senior British Open.

Langer, the 2010 champion at Carnoustie, had a 67 to match Wiebe at 5-under 135.

South Africa’s David Frost was a stroke back after a 68. First-round leader Gene Sauers had a 70 join Peter Fowler (69) and Mark McNulty (67) at 3 under.