(AP) - Louis Oosthuizen ran off a flawless string of seven straight birdies Sunday to race by Rory McIlroy and take a three-shot lead into the final round of the Deutsche Bank Championship.

McIlroy played well. So did Tiger Woods. It just didn't look like it compared with Oosthuizen, the South African with one of the sweetest swings in golf who had an 8-under 63.

His birdie streak included four putts of at least 20 feet, and he shot 29 on the front nine of the TPC Boston.

His seventh straight birdie on the 10th hole, a tap-in, put him at 8 under through 10 holes.

McIlroy rallied for a 67 and will play in the  final group with Oosthuizen on Labor Day.

Woods had a 68 and was six shots behind.

(Copyright 2012 by The Associated Press. All Rights Reserved.)