Weir was under par on five of his final six holes

FIIRST-ROUND LEADERBOARD:
US unless stated
-9 M Weir (Can)
-8 V Singh (Fij)
-7J Durant, B Quigley, W Austin
-6 T Woods, A Oberholser

Canadian Mike Weir birdied five of his final six holes to take a first-round lead at a rain-hit Buick Open.

The former US Masters champion shot a nine-under-par 63 to lead Fiji's Vijay Singh by one shot.

They were among the early starters who benefited from good conditions before rain brought a halt to play with more than half the field yet to finish.

World number one Tiger Woods, who began his round with five straight birdies, is three shots off the lead.

"It's awfully fun when that happens," Woods said of his sizzling start.

"I did start off on the easier of the two sides, though, and got it going early. Just couldn't keep it going."

After picking up another stroke at the seventh, Woods bogeyed the 199-yard eighth for a six-under total.

Weir was out in front by then with five straight birdies of his own from the 13th hole.

"It was a great round," Weir said.

"I think the key on this golf course is to drive it in the fairway, and I did that well today. I may have hit one ball in the first cut maybe all day, and that was it."