The 2018 PGA Championship at Bellerive Country Club from outside St. Louis continues on Sunday, August 12, with the final round.
At the par-5 8th hole, Woods had to lay up with his second shot but hit a great approach.
The 14-time major victor was three under for his round to that point and carried on where he left off on Saturday morning, pitching to five feet and holing the birdie putt.
A former world number one and the 2013 Masters victor, Scott muscled his way into second place on 10-under, while Spaniard Jon Rahm (66) and Americans Rickie Fowler (69) and Gary Woodland (71) were three behind. Adam Scott is two back of Koepka, with Jon Rahm, Rickie Fowler and Gary Woodland in a tie for third, three strokes back.
That will mean a long day for guys like Woods, who could play more than 28 holes Saturday.
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Woods, 42, found himself three-over par after the first two holes. Unfortunately, his non-birdie, at No. 6, was a triple bogey when he hit his tee shot at the par-3 into the water and then flew the green with his second shot.
"I think May is going to be a lot better for this golf tournament for sure", he said.
The Golf Channel's Justin Ray highlights how good the scoring was on Friday, tweeting that it was only the second time in major championship history that there were two scores of 63 in the same round.
However, his challenge stuttered on the back nine with a run of frustrating pars, wasting an eagle chance by three-putting the 17th, to finish on eight-under 202.
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Lowry fared even better, the 31-year-old playing his remaining eight holes in three under par as he continues to rally after a disappointing season. The greens are also rolling more quickly, and more to the players' liking, after they were a touch slow Thursday from rain early in the week.
Woods' round resumed at 7 a.m. local time, 70 yards from the hole, middle of the eighth fairway for his third shot to the par-5.
After the third and final stop of his post-round media blitz, at the end of a 13-hour workday in 90-degree heat, Tiger Woods trudged up the steps of the Bellerive clubhouse and into the air-conditioned comfort of the locker room.
Jordan Spieth's chances of claiming the win he needs to complete the career grand slam looked to have disappeared as he suffered a nightmare triple-bogey seven on the 12th. "And I just wish I could have got myself a couple more shots closer to the lead, especially with the way 17 is playing, moving the tee way up like that".
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Phatlum had led Hall by a single shot overnight and the pair jostled throughout an absorbing final day's play. Hall added: "I was in the final round previous year [at Kingsbarns] and that is definitely going to help me".