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.
"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.
"It was a great day," Merrick said. "I got off to a good start, hit it over the green on 2 and chipped in for eagle, and that kind of calmed me down. … I hit it well and made a lot of putts."
He won the Northern Trust Open in February at Riviera for his first PGA Tour title.
Bubba Watson was 9 under after a 67.
"I haven't been in too much trouble," Watson said. "When I hit it in the rough I have a decent lie or miss it in the right spot so I can hit the green in regulation. I missed three greens in two days, so I'm just hitting my irons well, playing smart golf, and then I made a few putts."
Aaron Baddeley and Patrick Reed shot 68 to reach 8 under, and Tommy Gainey (64), Chris Kirk (69) and James Hahn (68) followed at 7 under.
Mike Weir was the top Canadian, following his opening 73 with a 67 to move into a tie for 26th at 4 under.
Senior British Open
SOUTHPORT, England - Mark Wiebe of the United States shot a 5-under 65 Friday to share the lead with Bernhard Langer of Germany 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.
"I really got my irons zoned in on the back nine," Wiebe said. "I know there's a long way to go, but I'm tickled to be where I am. It was unbelievable and great to shoot the low round."
Wiebe moved to 1 under by the turn with two birdies and a bogey. He had three birdies in four holes from the 13th and added another with a 15-foot putt at the last.
Langer dropped two strokes at No. 6 when he double-hit the ball.
"The ball was sitting up in the long grass, and I caught it high on the clubface and again on the follow-through," said Langer, a two-time Masters champion. "But that was my only blemish. Most of it was impressive and good, and I putted a little better today."
David Frost of South Africa (68) finished a stroke back in third.