TORONTO — Carl Pettersson's family left Sweden when he was 10, spent five years in England, then settled in Greensboro, N.C.

"I call myself a mutt," Pettersson said Sunday after rallying to win the Canadian Open for his fourth PGA Tour victory. "I'm not your typical Swede, as you know. I don't have a 28-inch waist and I don't eat bananas at the turn, stuff like that."

In fact, he considers his ample gut a necessity, something he learned after a successful fitness kick backfired following the 2008 season.

"Obviously, I was a little overweight," Pettersson said. "I thought, `Well, I'll get fit.' So I actually lost 30 pounds — and my game completely left me. I guess the timing of the swing and everything was thrown out, and I really struggled in '09. ... I'd love to be fitter, but I'm not going to go down that road again."

He ended up getting a lot more exercise than he expected at hilly St. George's after opening rounds of 71 and 68 left him in danger of missing the cut.

"Right when I finished (Friday), I thought I had missed," Pettersson said.

"I walked in the locker room and (fellow player) Jay Williamson had all the scenarios written out, and he's like, `Grab a beer.' Before you know it, I'd had seven beers. Made the cut. And my caddie had to drive me home. I wasn't in that bad of shape, but I didn't want to drive. I can usually handle seven beers."

He made the cut by a stroke, then shot a tournament-record 60 on Saturday and closed with a 67 to beat Dean Wilson by one shot, finishing at 14 under.

"I still can't believe I won," said Pettersson, six strokes behind Wilson with 11 holes to play and four back with seven to go.

Wilson, playing on a sponsor exemption, shot a 72 after opening with three straight 65s to take a four-stroke lead into the final round.

"If you would have told me before the week that I could be second alone, I would have been tickled," Wilson said. "Being in the position that I was, I'm a little disappointed. But still, lots of positives."