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 in Oakville, Ontario.
The five-time PGA Tour winner had eight birdies in his bogey-free round at Glen Abbey to reach 13-under 131.
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 par 71 — and Greg Norman in 1986.
KNOX SHOOTS 59
Russell Knox shot the fifth 59 in Web.com Tour history, 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 in Idaho.
Knox, 28, 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 had a one-stroke lead at 13 over after opening with a 69 on Thursday.
Life Christian graduate Michael Putnam (64) and ex-University of Washington player Alex Prugh of Spokane (67) are in a five-way tie for ninth at 131.
Putnam’s younger brother, Andrew, missed the cut by one shot at 137 after shooting a 68.
ABE IN FINAL
Lakareber Abe moved into position to become the first black female player to win a U.S. Golf Association individual championship, winning two matches to advance to the 36-hole final in the U.S. Girls’ Junior Championship in Fort Wayne, Ind.
Abe will face Gabriella Then in the final. Abe is trying to become the fourth black player to win a USGA individual title, following Bill Wright, Alton Duhon and Tiger Woods.
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 in Southport, England. 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. ... Scottie Scheffler and Davis Riley won quarterfinal and semifinal matches at Martis Camp Club to advance to the 36-hole final in the U.S. Junior Amateur in Truckee, Calif. The 17-year-old Scheffler, from Dallas, won three matches Friday, finishing off Justin Suh of San Jose, Calif., 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. The 16-year-old Riley, from Hattiesburg, Miss., topped Dou Zecheng of China 4 and 2 in the quarterfinals, and beat John Augenstein of Owensboro, Ky., 4 and 3, in the semifinals.