Louis Oosthuizen (left) strung together seven birdies in his round of 8-under 63 that helped him take a three-stroke lead over Rory McIlroy (right). The final round of the Deutsche Bank Championship is Monday. (Associated Press)

Louis Oosthuizen (left) strung together seven birdies in his round of 8-under 63 that helped him take a three-stroke lead over Rory McIlroy (right). The final round of the Deutsche Bank Championship is Monday. (Associated Press)