Two-time US Open champion Brooks Koepka seized a two-stroke lead after Saturday's third round of the PGA Championship while Tiger Woods charged into contention for his first major title in 10 years.
Fourth-ranked Koepka, who had stretched the lead as large as five shots, fired a four-under par 66 to stand on 12-under 198 after 54 holes at Bellerive Country Club in the year's final major event.
Koepka, who became the first back-to-back US Open winner since 1989 in June at Shinnecock, birdied five of the first nine holes but stumbled with bogeys at 14 and 15 only to boost his lead with a birdie at the par-5 17th.
"I played pretty well. Got off to a hot start," Koepka said. "On the back just made a couple bad swings. It was nice to right the ship there. Made a couple of key putts. I feel really good.
"I just have to stay in the moment, don't think about anything else, just come out and play tomorrow."
Australian Adam Scott, the 2013 Masters champion, was second on 200 after shooting 65 Saturday with Spain's Jon Rahm and Americans Rickie Fowler and Gary Woodland, each chasing his first major title, sharing third on 201.
"Brooks had a massive lead and then two holes later it was one shot," Rahm said. "Going into the back nine on Sunday, anything within three shots is doable."
Woods, a 14-time major champion in his comeback season from spinal fusion surgery, fired a 66 to share fourth on 202 with second-ranked defending champion Justin Thomas, 2009 British Open winner Stewart Cink, Ireland's Shane Lowry, Australia's Jason Day and South African Charl schwartzel.
Woods birdied five of the first eight holes then closed with 10 consecutive pars and finished four off the pace of Koepka, who took his second consecutive US Open triumph in June at Shinnecock.
"I could've been a little bit closer but I've got a shot going into tomorrow," Woods said. "I hit it good on the back nine. I just didn't make anything. I struggled to hit it as the greens were getting slower. I just have to make the adjustments better than I did."
- Turning back the clock -
The 42-year-old former world number one finished off the last 11 holes of a storm-halted second-round 66 Saturday morning, then delighted spectators with a sizzling afternoon start.
"Tiger was performing great. It was just like turning back the hands of a clock," said Cink, who played alongside Woods.
Koepka, who missed the Masters with a left wrist injury, could become only the fifth player to win the US Open and PGA Championship in the same year, the first since Woods in 2000.
Aussies Scott and Day were playing with their thoughts on Jarrod Lyle, the Aussie golfer who died Wednesday after a long battle with leukemia.
"It has been a very difficult week," Scott said. "We're all sending our thoughts back to his family in Australia."
Hoisting the Wanamaker Trophy could be a major tribute as weell.
"I'm playing some good golf. I just need to shoot a lot one to try to get these guys. The course is gettable if you're shooting from the fairways," Scott said.
Woods, who has never won a major title when not leading after 54 holes, won his most recent major at the 2008 US Open and has not won any event since the 2013 WGC Bridgestone Invitational, although he led late on Sunday in last month's British Open.
- A toll on Tiger -
"I'm tired. It just takes a lot out of you," Woods said. "I played 29 holes in the heat. It takes it out of you not just physically but mentally."
After an early birdie binge, Woods made a tension packed par putt at 10.
"It was a big putt," he said. "I had a lot of momentum going. I didn't want to lose any there."
But he three-putted from 19 feet to par the par-5 17th, saying, "I got too aggressive and it cost me."
Britain's Matt Wallace made the first hole-in-one of the tournament, using a 5-iron for an ace at the 232-yard, par-3 16th hole.
Wallace, with European Tour wins at the Indian Open and BMW International Open this year, watched the ball bounce twice and roll the final few feet into the cup.