Henrik Stenson broke another club Friday -- this time by accident.

And it didn't matter.

Playing with only 13 clubs in the bag after his 4-wood broke on the practice range, Stenson made three birdies on the opening four holes at East Lake to quickly seize control and shot 4-under 66 to build a four-shot lead over Adam Scott in the Tour Championship in Atlanta.

For all his birdies, the best move he made all week was deciding to put the 4-wood in his locker instead of carrying it with him.

Stenson heard a funny sound after hitting five shots on the range, showed it to Steve Stricker and realized the face caved in. A television viewer who heard about the incident called the PGA Tour to see if the Swede had kept it in his bag, and officials checked with Stenson after his round.

If he had left it in the bag without using it, Stenson would have been assessed a four-shot penalty -- the margin of his lead. If he had used the club, he would have been disqualified. Stenson had no intention of using it, though sending it to his locker saved him.

He wasn't sure it was a violation to carry a nonconforming club, nor did he know the penalties.

Stenson was at 10-under 130 going into the third round.

Tiger Woods is not in position to halt the hottest player in golf. Woods was headed toward the best round of the day, 5-under through 13 holes, when he made double bogey on the 14th, had a triple bogey on the 17th and wound up with a 71. He was 14 shots behind. It was the first time since the 2011 PGA Championship that Woods began a tournament with back-to-back rounds over par.

Scott sputtered at the start. He was one shot behind Stenson and quickly fell five shots behind with a couple of poor tee shots. Scott wound up with a 69 that put him at 6-under 134.

Jordan Spieth, the 20-year-old rookie, had a 67 and was five shots behind. U.S. Open champion Justin Rose, Dustin Johnson and Billy Horschel were another shot back.

There's never a dull moment with Stenson, who only last week made news for all the wrong reasons when he smashed his driver on the final hole of the BMW Championship and tore up his locker at Conway Farms.

"They're not going to believe me anyway after last week that the 4-wood broke during natural causes," he said.

Told that Stenson only had 13 clubs in the bag, Scott said, "It didn't seem to bother him."