OAKVILLE, Ontario - Brandt Snedeker was on seventh tee when he noticed something wasn't quite right.

He couldn't find Hunter Mahan's name at the top of the Canadian Open leaderboard.

"I looked at my caddie, and I go, 'What's going on?'" Snedeker said. "He goes, 'I think Hunter had to leave because (his wife) went into labor.'"

Mahan, the second-round leader at 13 under, withdrew Saturday and rushed home to be with his wife, Kandi, in Dallas for the birth of their first child, leaving a big opening for Snedeker.

"Kind of left the tournament wide open," Snedeker said. "Hunter was going to be hard to catch because he was playing so good. The way he drives the golf ball on this golf course, he was going to play really well on the weekend. For me to catch him, I knew I was going to have to shoot something really low."

Snedeker had a 9-under 63 at rainy Glen Abbey to take the lead after the third round. The 2012 FedExCup champion had nine birdies, playing the front nine in 6-under 29. Sweden's David Lingmerth was a stroke back after a 65, and Matt Kuchar and Jason Bohn were at 12 under.

"You always feel like you're exactly one swing away from hitting something off the planet," Snedeker said. "I felt like I managed my game really well today."

Senior British Open

SOUTHPORT, England - Bernhard Langer seized a three-shot lead after the third round of the Senior British Open on Saturday, mastering Royal Birkdale with superb links play for a 4-under 66.

Langer shared the overnight lead with American Mark Wiebe but birdied three of his first seven holes to jump in front on his own. David Frost of South Africa shot his third straight 68 to sit alone in second place, and Wiebe managed only a 70 to drop into third, four shots back.

Langer's only bogey came on the 14th, but he finished with two birdies on 15 and 17 to stay in control.

"That was as good as I can play," said the German, who is bidding for his second Senior British Open title, having won at Carnoustie in 2010. "My ball-striking was almost perfect ... apart from the mistake at the 14th."

First-round leader Gene Sauers of the U.S. (70) was tied for fourth, six shots back.

Chip shots

• In Fort Wayne, Ind., Gabriella Then of Upland, Calif., won the U.S. Girls' Junior Amateur, spoiling Lakareber Abe's bid to become the first black female individual champion in U.S. Golf Association history.

• In Truckee, Calif., Scottie Scheffler of Dallas won the U.S. Boys' Junior Amateur, beating Davis Riley 3 and 2 in the 36-hole final at Martis Camp Club.