The third round of the PGA Championship has been suspended for the day Saturday after heavy storms hammered the Ocean Course at Kiawah Island.

With half of the field still on the course, the third round will resume at 7:45 a.m. ET Sunday. The final round will feature the players in threesomes off both the first and 10th tees.

When the horn sounded to stop play at 4:50 p.m., Rory McIlroy had just bogeyed the ninth to fall into a tie for the lead with second-round co-leader Vijay Singh, who made a ridiculous birdie at the par-5 seventh.

The pair is knotted in first at 6-under par.

Adam Scott is trying for redemption after his collapse at Royal Lytham & St. Annes three weeks ago and his round on Saturday is doing a lot to help him reach that goal.

Scott is 4-under on his front nine and is third at minus-5.

Carl Pettersson, one of three second-round leaders, is even on the day and fourth at 4-under par.

One player who was definitely happy for the suspension had to be Tiger Woods, the final co-leader from round two.

Woods bogeyed three of his last four holes and has almost 10 feet for par at the eighth. He fell down to 1-under par for the tournament and is five off the lead.

Woods has been so erratic with his play on Saturday, he's already given out two autographed gloves after his shots hit spectators.

The 4-time PGA Champion parred his first two and had four feet for birdie at the third. Woods pulled the putt and things really fell apart after that hiccup.

Woods drove into the left rough at four and nearly came out of his spikes with how hard he tried to hit his approach. The ball flew over the green and Woods made bogey.

At the par-3 fifth, Woods hit an ugly 6-iron that didn't even land before Woods started walking after it. He missed the green left, pitched to 12 feet and missed the par save.

After a routine par at No. 6, Woods went way right off the tee at the par-5 seventh. With the ball a few feet below him in a sand area, Woods hit his second farther right. He hit his third into a left bunker, then blasted his sand shot 12 feet by and it stopped at that point only because the ball hit the stick.

That led to another bogey and Woods was 1-under. He came up short off the tee at the par-3 eighth and chipped to 10 feet.

Mercifully for Woods, the horn sounded and play was halted.

His playing partner probably didn't want to hear that.

Singh rolled in a 10-foot birdie putt at the first and his only other birdie came at seven. After an errant drive to the right, Singh came up shy of the green with his second at the par-5 hole. He chunked his pitch 35 feet short of the flagstick, but sank the long birdie try to get to 6-under.

McIlroy flew out of the gate on Saturday.

He birdied his first two holes, then found some trouble at No. 3.

McIlroy's drive landed in a tree and he couldn't find it. No one in the search party could, but CBS' broadcast spotted it in the tree and McIlroy was informed. He took an unplayable, dropped, then hit his third to six feet. McIlroy drained the unbelievable par save.

"I knew the line of the ball was right on the tree," said McIlroy. "We'd been looking for it for maybe about three minutes, and then one of the guys who was working for TV came over and said 'it's actually stuck in the tree.'"

He followed with a 6-foot birdie putt at No. 5 to get into a share of first with Singh at 5-under par.

After a par at six, McIlroy laid up with his second at the par-5 seventh, then wedged his third to a foot. McIlroy tapped in to take a 1-shot lead.

At the par-3 eighth, the 2011 U.S. Open champion hit his tee ball to five feet. McIlroy ran home the birdie putt and was two clear at 7-under par.

McIlroy drove into the rough at nine and his 9-iron approach came up well short of the target. That led to a bogey and, after Singh's birdie at seven, the two were tied for the lead.

He will have 27 holes to try and secure his second major title.

"I don't mind," said McIlroy. "It's nice going into the final day in a great position. Being 27 holes, I don't mind if it takes a while to get done."

The ages of the co-leaders could lead to some history if either were to win on Sunday.

At 49, Singh could become the oldest major champion in golf history.

If McIlroy, all of 23, goes on to hoist the Wanamaker Trophy, he will become the youngest player by a few months to have two major titles. Woods was 23 years and eight months when he won this title at Medinah in 1999. McIlroy is only 23 years and about four months.

Bo Van Pelt is the clubhouse leader after a 5-under 67 left him at 3-under par for the championship. Former Masters champion Trevor Immelman is 3-under for the championship through 10 holes.

Steve Stricker also had a 67 on Saturday. He is in at minus-2, while Peter Hanson, Graeme McDowell and Ian Poulter are all at that number with more golf to go in round three.

NOTES: Phil Mickelson is 1-over on his round through 11 holes and is 1-over for the tournament...Defending champion Keegan Bradley is also 1-over...John Daly is at plus-2 with four holes to finish in round three...World No. 1 Luke Donald shot a 2-over 74 and is at 8-over par.