With just 18 holes of golf remaining at The Barclays from Bethpage Black in Farmingdale, New York, Rickie Fowler holds a one-stroke advantage after Saturday's third round.
Fowler shot a three-under on the day to drop his overall score to nine under. Here's a look at the leaderboard heading into Sunday's final round:
For the second straight day, Fowler put together a clean round with birdies on Nos. 4, 7 and 18. In total, he's gone 45 consecutive holes without a bogey.
Tied with Patrick Reed for first at eight under, Fowler's final birdie of the day on the final hole gave him the lead. The PGA Tour showed his approach:
Reed entered Saturday's third round with the lead but could only go even to drop into second place.
His score could have been much worse after he carded three bogeys on the front nine, but he managed to answer with birdies on Nos. 4, 7 and 9 to come out without a scratch.
Adam Scott had the best round out of any golfer so far, shooting a six-under 65 to hop up 23 places into third place.
Starting the day at one under and seven strokes off the lead, Scott began his day in grand fashion with an eagle on No. 1 and a birdie on No. 2.
After a bogey on No. 3, the Australian added two more birdies on Nos. 4 and 7 to cap off his front nine.
Making the turn to the back, Scott used his hot putting to lower his score further, sinking a pair of 45-foot putts on Nos. 12 and 15.
The PGA Tour showed his final birdie of the day on 15:
Those two birdies put him in the lead at eight under, but a bogey on No. 16 dropped him into third. He spoke about his round, via the PGA Tour:
Two strokes behind Scott in a tie for sixth is world No. 1 Jason Day, who went one under to settle at five under after three rounds.
He was unable to get any sort of momentum Saturday, as his five birdies came with four bogeys. That kind of irregular play won't do him any good if he wants to climb the leaderboard.
On a course that is offering such drastic degrees of difficulty from hole to hole, being able to scramble for pars is going to separate the eventual champion from the rest of the field.
Through the first three days, that player is Fowler, who seems most likely to stay clean during the final round and lower his score further.
Stats courtesy of PGATour.com.