Dustin Johnson, Justin Thomas and Bryson DeChambeau were among those to pack their bags as the field was cut to 16 at the WGC-Dell Technologies Match Play on Friday.
Top-seeded Johnson lost to Kevin Na, who finished birdie-birdie to turn the match and eliminate his fellow American from Group 1 on day three in Austin.
Scotland's Robert MacIntyre progressed out of the group after a tie with Adam Long, having landed one of the shots of the week with a spectacular drive on the 18th which ended up inside three feet and ultimately got him through.
"I had probably one of the best and one of the luckiest golf shots I've hit in my life," the Scot said.
"I had a bit of bad luck here and there and managed to turn it around right at the end there, and it's one of them things, you've just got to keep fighting until the end, and it just shows anything can happen in this game."
Johnson and Na's match was not without tension, with the 28th-seeded American tapping his opponent on the shoulder on the 11th green to warn him about collecting his ball before concession had been verbalised.
In a mildly tense exchange, Johnson appeared to apologise but walked away less than impressed.
DeChambeau, the fifth seed, bowed out at the hands of Tommy Fleetwood, who topped Group 5.
Fleetwood had established a 4up advantage through seven holes but stumbled, allowing DeChambeau back in the match. The Englishman finished with a par on the 18th to win.
"It turned really scrappy for a lot of the back nine," Fleetwood said. "He started coming back and on the last an unlikely par. Match Play is that funny all week. There are guys who have played better than me for three days who are going home and I'm going through."
World number two Justin Thomas was another casualty, despite defeating 2010 Open champion Louis Oosthuizen 3 and 2.
There were eight playoffs required, with Jon Rahm, Bubba Watson and Sergio Garcia among those winning to join the likes of Jordan Spieth in the last 16.
Garcia delivered an incredible shot to beat Lee Westwood, making a hole-in-one at the fourth hole.
Rory McIlroy was also eliminated, tying with Cameron Smith as Ian Poulter finished top of Group 11 after three wins.
PGA Championship: Morikawa and Schauffele share lead ahead of final round
Collin Morikawa and Xander Schauffele are joint leaders at the PGA Championship, with a host of contenders still in with a chance of triumphing going into the final round.
Schauffele crucially recovered from a double-bogey on 15 to birdie his last two holes on Saturday. That meant he finished on 15 under, carding a second successive 68.
Morikawa went one better with a four-under 67, so sits in a share of the lead in pursuit of his third major title, having recovered impressively from a bogey on two to produce a blemish-free round from there.
Sahith Theegala is only one behind the leaders at Valhalla Golf Club, while Shane Lowry, Bryson DeChambeau and Viktor Hovland are only two off the lead.
Lowry stormed into contention as he equalled the lowest round in men's major history during a sensational third round in Kentucky.
The Irishman carded nine birdies and no bogeys to set a new career low and jump to 13 under after being eight strokes off the lead at the halfway stage.
Lowry had the opportunity to produce the first '61 round' in a men's major history but missed the hole by mere inches on 18, settling for a record-equalling 62 instead.
It is just the fifth time a 62 has been carded at a major, with Schauffele doing it for the second time on the first day at Valhalla.
Robert MacIntyre and Justin Rose are also in striking distance, as they sit three shots off the pace after producing impressive rounds of 66 and 64 respectively.
Rory McIlroy, though, is seven shots behind Morikawa and Schauffele at eight under, level with Jordan Spieth.
And, after a tumultuous week, world number one Scottie Scheffler looks to have slipped out of contention after posting a two-over 73. He is on seven under in a tie for 24th position.
As for Schauffele, he has had 12 top-10 finishes at majors, including two second-place and two third-place finishes. He has lead since round one and will now look to finish the job on Sunday.
"Felt like I've had to work for a lot of my birdies the last two days," he said after round three.
"Haven't been able to make many putts. I feel like I'm still hitting the ball. Feel like I'm hitting the ball pretty nice.
"If I can just get the putter going a little bit, it should free me up."
PGA Championship: Lowry in contention with record-equalling round
Shane Lowry stormed into contention for the PGA Championship as he equalled the lowest round in men's major history during a sensational third round at Valhalla.
Lowry carded nine birdies and no bogeys on Saturday to set a new career low and jump to 13 under after being eight strokes off the lead at the halfway stage.
The Irishman had the opportunity to produce the first '61 round' in a men's major history but missed the hole by mere inches, settling for a record-equalling 62 instead.
It is just the fifth time a 62 has been carded at a major, with Xander Schauffele doing it for the second time on the first day at Valhalla.
Rickie Fowler had previously done it in round one of the 2023 US Open along with Schauffele, while Branden Grace was the first to do it at The Open in 2017.
"I just went out there with the hope of trying to get myself towards double digits," he told Sky Sports.
"I thought if I could get myself to 10 under today, I could give myself a chance going into tomorrow. I went out and got off to a great start, rolling putts in and felt great and just kept going. I enjoyed it. Myself and Justin Rose, we were great out there and just enjoyed every minute of it.
"It’s pretty cool to do something like this, but there is a lot more to do tomorrow."
Rose played a 64 to finish seven under on the round and moves to 12 under for the tournament.
Meanwhile, Rory McIlroy shot a three-under 68 to move to eight under par in the Championship, and reigning champion Brooks Koepka is now on four under after a 74.
Schauffele, Scottie Scheffler and Collin Morikawa were among the later starters in Kentucky.
PGA Championship: Woods determined to 'keep fighting' after missing cut at Valhalla
Tiger Woods vowed he would "keep fighting" after missing the cut at this year's PGA Championship.
The four-time champion will be absent from the weekend at the second major of the season, having carded rounds of 72 and 77 in Valhalla.
Woods concluded his opening round with a bogey-bogey finish, while he hit two triple-bogeys in the first four holes of his second round - doing so multiple times in a single round at a major for the first time.
The 48-year-old, who finished seven over par and 19 strokes behind halfway leader Xander Schauffele, was making his first appearance on the PGA Tour since last month's Masters, and knows he needs to improve ahead of the US Open at Pinehurst in four weeks' time.
When asked about his next steps, the 15-time major champion responded: "Just keep fighting. Keep the pedal on, keep fighting, keep grinding, keep working hard at posting the best score that I can possibly post. That's all I can do.
"I got off to a bad start [in the second round] and the rough grabbed me at [the second hole]. I compounded the problem there at [the fourth].
"[I] just kept making mistakes and things you can't do, not just in tournaments but in majors especially. I hung around for most of the day, but unfortunately, the damage was done early.
"I need to play more. Unfortunately, I just haven't played a whole lot of tournaments. Hopefully, everything will somehow come together in my practice sessions at home and be ready for Pinehurst."
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