Phil Mickelson and Brooks Koepka both shot 70 Saturday to set up a mouth-watering final pairing at the US PGA Championship. 

At seven under par for the tournament, Mickelson holds a one-stroke lead over his countryman entering the final round at Kiawah Island's Ocean Course after saving par on 18 while Koepka bogeyed the last. 

The 50-year-old Mickelson is the fourth player aged 50 or older to lead a major after three rounds in the modern era, which began in 1934. 

The others were Tom Watson at the 2009 Open Championship, Greg Norman at the 2008 Open, and Julius Boros at the 1973 US Open -- none of whom ended up holding on for the win. 

Mickelson has been resilient this week in South Carolina, though, steadying himself Saturday after going bogey-double bogey on 12 and 13 to make par on the final five holes. 

While Mickelson's resurgence has excited the fans, Koepka remains a model of consistency at the PGA.

He has finished at least tied for fourth in 12 of the last 13 rounds at the major, and he could become the first player to win the same major three times in a four-year stretch since Watson won the Open in 1980, 1982 and 1983.

Mickelson will be shooting for his sixth major title and first since the 2013 Open, while Koepka seeks his fifth. 

Louis Oosthuizen, who shared the lead with Mickelson entering play Saturday, managed just three birdies on the day on the way to an even-par 72 that left him five under for the tournament. 

American Kevin Streelman (70) is at four under, while Oosthuizen's South African countrymen Branden Grace and Christiaan Bezuidenhout are at three under after even-par rounds of their own. 

Bryson DeChambeau (71) was unable to gain ground on the leaders and enters Sunday five back of Mickelson along with Gary Woodland (72) and Joaquin Niemann (71). 

Jordan Spieth matched Billy Horschel for the low round of the day with a 68, and he sits at even par for the tournament along with Rickie Fowler (69) and Keegan Bradley (72).

Reigning Masters champion Hideki Matsuyama fell from contention with a 76, putting him at one over with the likes of Shane Lowry (73), Padraig Harrington (73) and Ian Poulter (73). 

Phil Mickelson played himself right into contention to become the oldest major champion in history after taking the clubhouse lead on day two of the US PGA Championship.

The 50-year-old looked in good shape in his first round on Thursday and he went a step further on Friday, finding himself top of the leaderboard having gone around the Ocean Course at Kiawah Island in 69.

It meant the American was on five under for the tournament, and he was leading by two shots shortly after he had finished for the day.

For much of Friday it looked as though Branden Grace was going to be in charge, the South African sitting pretty at six under for the tournament as he stepped up to the tee on the 17th.

But he finished his round with a double-bogey and a bogey as the breezy conditions took their toll on the two holes regarded as the toughest on the entire course, meaning he walked off after his final hole three under for the tournament.

Mickelson had similar issues on the same two holes earlier in the day after starting on the 10th, though the five-time major winner only dropped two shots across the 17th and 18th – it clearly was not enough of a wobble to really impact his mood.

The 2005 US PGA Championship winner has not had a single top-10 finish on the PGA Tour this season, but he has a great chance to end that here.

Opening up on his brilliant start at Kiawah Island, he said: "Physically I've felt as good as ever, I've been able to perform to play the shots, but I haven't been able to be as present or sharp mentally to visualise the shots I want to play.

"Meditation has been a big part of me being able to play the shots I want. It's gotten more difficult as I've got older to focus. Your mind is like a muscle, you have to exercise.

"That's what I've been doing, some days playing [as many as] 40-45 holes to make sure I can concentrate longer than just 18."

Mickelson carded five birdies after the turn, playing a huge role in putting him into contention to surpass Julius Boros as the oldest ever major winner at 48 in 1968.

Additionally, he is the first man aged 50 or over to be in top-five contention after 36 holes at a major since 2013.

His form here is made all the more remarkable by the fact he needed a special exemption to even qualify for next month's US Open, given his current ranking of 115.

"I'm having a lot of fun," he added. "To play well, to know I'm playing well heading into the weekend, to be in contention, to have a good opportunity, I'm having a blast. I'm excited for the weekend."

Ian Poulter looked to be putting himself into contention as well only to fall apart in the latter stages of his round, carding four bogeys in his final five holes – he was previously six under for the day.

Similarly, overnight leader Corey Conners' dropped down to two under for the tournament thanks to a difficult three-over second round.

Meanwhile, world number one Dustin Johnson will almost certainly not be returning on Saturday as he followed up a shocking first day with comparatively poor two over on Friday, leaving him on six over.

Jordan Spieth faces a nervy wait, he sits at four over following a second-round 75.

Branden Grace believes he was guided to victory at the Puerto Rico Open by his late father as the South African secured an emotional triumph.

Grace holed a chip-in eagle from the bunker at the 17th and closed with a birdie to finish on 19 under, one stroke ahead of Jhonattan Vegas.

The 32-year-old's PGA Tour success on Sunday comes after his dad died with coronavirus in January.

"My old man passed away not too long ago, and he always said I'm an aggressive player and I knew he was watching over me," Grace said following his final-round 66.

"It was good. I was just able to hit the shots that I needed. I just stayed in the moment, in the zone. I played the right shot at the right time. I got aggressive.

"I spoke to my wife today and she said that my dad's watching over me and he'll give me the guidance I needed, and he did."

Home hope Rafael Campos, ranked 666th in the world, finished in a tie for third after shooting a closing 70.

Grayson Murray and local hope Rafael Campos share a one-stroke lead after the third round at the Puerto Rico Open.

Murray produced the round of the day with a seven-under-par 65 at the PGA Tour event in Rio Grande on Saturday.

The American – searching for his first Tour victory since the 2017 Barbasol Championship – was flawless on the front nine with five birdies.

Murray finished with eight birdies in total and just one bogey to be level alongside Puerto Rican golfer Campos.

Campos used a third-round 67 to join Murray atop the leaderboard following a rain-hit day.

Australia's Cameron Percy (67) and South African Branden Grace (68) are tied for third and a stroke behind the duo heading into Sunday's final round.

Brandon Wu edged into a one-stroke lead after shooting a five-under 67 in the Puerto Rico Open second round on Friday.

The American backed up his opening-round 66 with another fine showing to get to 11 under at the halfway mark of the PGA Tour event in Rio Grande.

Wu was one under through 11 holes in his second round before picking up four shots on his final seven.

He sits a shot ahead of Greg Chalmers, the Australian carding a 68 as he chases his first PGA Tour success since 2016.

Branden Grace (68) and Rafael Campos (69) are tied for third at nine under, a stroke clear of Jhonattan Vegas (68), Cameron Percy (69), Nelson Ledesma (67) and Thomas Pieters (67).

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