BETHESDA, Md. -- There's still a lot of golf to be played at Congressional, where the final groups have made the turn, but Bill Haas is in position A, sitting atop the leaderboard at 9 under and one shot clear of the field.
Haas made the turn in 2 under, breaking from the pack with birdies on Nos. 8 and 9, where he rolled in 10 and 12-footers, respectively.
Now comes the difficult part: Congressional's back nine.
Haas has struggled there a couple of times this week.
In the third round, he triple-bogeyed the 11th hole. Only three birdies helped him salvage a 1-over final nine on Saturday.
He didn't fare that well in that stretch on Thursday, either, making a double bogey, two bogeys and two birdies.
Roberto Castro, who began the day with a share of the lead, is one back after playing his first nine holes in 1 under, while D.H. Lee and Jason Kokrak are two off the pace.
Jordan Spieth is one of four players tied for fifth at 6 under. The 19-year-old had a share of the lead earlier, but just bogeyed the difficult 11th hole to drop a stroke.