By the end of second-round championship play on Friday, two lesser-know players, Jason Dufner and Keegan Bradley, are tied for first, each with 135.
U.S. player Dufner shot a 70 on Thursday and 65 on Friday, while Bradley, also from the U.S., scored 71 Thursday and 64 Friday.
Tiger Woods, meanwhile, missed the cut with a score of 73.
For Friday's leaderboard, visit www.pga.com.