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.
“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.
Tommie “Two Gloves” Gainey of Camden shot a 64 and is tied for sixth, six strokes back.
Bubba Watson was 9 under after a 67.
“I haven’t been in too much trouble,” Watson said.
Wiebe, Langer lead Senior British Open
At Southport, England, Mark Wiebe of the United States shot a 5-under 65 to share the lead with Bernhard Langer after the second round of the Senior British Open 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.
Knox sizzles with 59
At Boise, Idaho, 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.
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 had a one-stroke lead at 13 over after opening a 69.
Swede grabs Russian lead
At Moscow, Rikard Karlberg of Sweden took a two-stroke lead over four others after the second round of the Russian Open, shooting a 4-under 68 Friday to move to 9 under overall.
Junior Am final set
At Truckee, Calif., Scottie Scheffler, 17, Dallas, and Davis Riley, 16, Hattiesburg, Miss., advanced to the 36-hole final in the U.S. Junior Amateur.