World number two Jon Rahm showed his class at the Mexico Open on Friday, claiming the outright lead after round two at 12 under.

Rahm was the joint-leader after a bogey-free first round, and kept that momentum going with another eight birdies the second time around, although they did come with three bogeys.

Two shots back at 10 under is Alex Smalley, who shot an incredible 30 on the front-nine thanks to birdies on two, six and seven, and an eagle on the par-four third hole. He finished with a second-round 66, one stroke off the round of the day.

A small group at nine under is in a tie for third, including Patrick Reed, Cameron Champ and Adam Long, who also all shot 66.

The next logjam at eight under includes Davis Riley, who was one of four players to shoot Friday's best score of 65 – along with Martin Trainer, Emiliano Grillo and Doug Ghim, with that trio all at five under after posting 72s in the opening round.

Also at eight under is Kurt Kitayama and Jonathan Byrd, who shared the first-round lead with Rahm, but could only manage 70s to now sit four strokes off the Spaniard.

A strong international contingent sits at six under in a tie for 18th, featuring England's Matt Wallace, India's Anirban Lahiri, Thailand's Kiradech Aphibarnrat and Japan's Satoshi Kodaira.

Kevin Na is one shot further back at five under, along with the leader of the Mexican contingent, Alvaro Ortiz, who birdied five of the first seven holes, but a double bogey on eight and two more bogeys on 10 and 13 wiped out a lot of his good work.

The higher-ranked players in the field, such as Cameron Tringale (four under), Tony Finau (three under) and Abraham Ancer (two under) will live to see the weekend as the cut-line landed on two under.

Camillo Villegas, Adam Schenk and Scott Gutschewski were disappointing, missing the cut after solid first rounds in the 60s, with all three of them posting second rounds of at least two over.

Bryson DeChambeau endured a wild third round, but the FedEx Cup play-off hopeful still ended the day tied for the lead alongside Patrick Cantlay at the BMW Championship.

DeChambeau carded a five-under-par 67 to earn a share of the three-stroke lead through 54 holes at the second FedEx Cup play-off tournament on Saturday.

The 2020 U.S. Open champion's round had a little bit of everything, from back-to-back eagles to back-to-back shots in the water at Caves Valley Golf Club in Maryland.

DeChambeau was flawless on the front nine, mixing two eagles and as many birdies as he turned a one-shot deficit into a three-stroke lead within two holes.

The 27-year-old is the fourth player to make back-to-back eagles this PGA Tour season, while he is only second to Cam Davis (20) for most eagles (19).

Just as DeChambeau threatened to run away from the field, the big-hitting American stumbled, settling for a share of top spot after finding the water at the par-five 12th hole (bogey) and par-three 13th (double bogey).

"It was definitely colourful," DeChambeau – projected to be second in the FedEx Cup points race – told PGA Tour radio. "Thought I played pretty well the front nine, did mis-hit a drive on seven.

"Felt weird. From then on out I wasn't driving it very well, so that's what I'm going to do, work on that for tomorrow. If I can get that straightened out like I did the first few days, off the tee the first couple holes today, I mean, I'll give myself a great chance again."

Cantlay – the current FedEx Cup leader – is also 21 under heading into Sunday's final round following his six-under-par 66.

He was almost bogey-free on day three, holing an eagle and five birdies before bogeying the last.

Im Sung-jae is the nearest challenger after his third-round 66, while Rory McIlroy (65), Abraham Ancer (66), Sam Burns (65) and Sergio Garcia (67) are tied for fourth at 17 under.

World number one and defending champion Jon Rahm lost ground, dropping to outright eighth – five shots back – after a two-under-par 67.

FedEx Cup champion Dustin Johnson posted a seven-under-par 65 to be 14 under, while Brooks Koepka (69) ended the day a further four shots behind – two strokes better off than Justin Thomas (69).

Abraham Ancer thought he had blown his shot at his first PGA Tour win the first time he played the 18th hole on Sunday. Turns out he just needed two more chances on the hole to make it happen. 

Ancer birdied the second playoff hole from six feet and watched as Sam Burns missed almost the same putt to give him the WGC FedEx St. Jude Invitational title as the third man in the playoff, Hideki Matsuyama, also made par. 

After finishing as runner-up four times in his previous 120 Tour starts, Ancer finally prevailed in Memphis to become the ninth first-time winner this season and the fourth player from Mexico to win on Tour. 

"This is surreal," he told CBS. "I thought I left so many shots out there on the back nine, but you never know. Golf is crazy.

"There's been some times that I felt like I made enough birdies to win and I didn't win. This is kind of how it goes and I'm happy that I got lucky."

A significant portion of that luck came on the first playoff hole, when Matsuyama had a chance to win it but saw his long putt for birdie on 18 lip out, sending the trio back to the 18th tee for another go.

The 2021 Masters champion turned in the round of the day just to make the playoff, firing a bogey-free seven-under 63 to fly up the leaderboard on the final day. 

Burns was close behind with a 64, a double bogey on 13 his only blemish. 

Harris English, who held a two-stroke lead after each of the first three rounds, watched those three fly by him as he slumped to a three-over 73 and finished fourth after opening the tournament with rounds of 62, 65 and 65. 

English bogeyed the opening hole before regaining his stride with three birdies, but he did not make another after the eighth hole, posting double bogeys at 11 and 14 and a bogey at the par-five 16th. 

The American said afterward that a warning for slow play on the front nine knocked him out of rhythm and he felt like he was rushing the rest of the day.

His playing partner Bryson DeChambeau had an even more difficult time after working himself into contention with a 63 on Saturday. 

DeChambeau carded a triple-bogey six on the 11th and also did not manage a birdie on the back nine on the way to a 74 that left him tied for eighth at 12 under for the tournament. 

Rough as that triple was for DeChambeau, honours for worst hole of the day went to Kim Si-woo.

The South Korean hit five successive shots in the water at the 11th on the way to a 13 – the worst score on a par-three hole on the PGA Tour since 1983, not including majors.

Among other notables, Dustin Johnson (70) tied for 10th at 11 under, one stroke better than Rory McIlroy (66) and Jordan Spieth (67).

Phil Mickelson (68) finished at seven under along with Louis Oosthuizen, who floundered to a 74 in the final round. 

Sergio Garcia (72), Collin Morikawa (69) and defending champion Justin Thomas (72) were at five under, with Patrick Reed (70) and Lee Westwood (71) one back of them. 

Olympic champion Xander Schauffele (68) was at even par and Brooks Koepka (76) at two over. 

Harris English maintained his two-shot cushion at the WGC-FedEx St. Jude Invitational leaderboard as Bryson DeChambeau climbed up the leaderboard.

Aided by three birdies during his final six holes, English carded a second successive score of 65 at TPC Southwind to sit at 18 under par.

The four-time winner on the PGA Tour endured a bogey-free round on Saturday, pulling clear in the closing stages having at one stage seen both Abraham Ancer and DeChambeau join him in top spot.

After a four at the par-five 16th, English produced an outstanding approach into the green at the next hole before rolling in a birdie putt, boosting his hopes of a wire-to-wire triumph in the tournament.

However, he is well aware that there is still plenty of work to do yet.

"There's a lot of good players behind me and my goal is just stick to my strategy and execute and whatever happens, happens," English said.

DeChambeau is not too far behind after a stunning 63 that saw him come home in just 30 shots. His seven-under score leaves him tied for second with Australian Cameron Smith, who signed for a 65.

"It was awesome being able to strike it that close to the hole all day," DeChambeau, who missed out on playing at the Tokyo Olympics due to contracting coronavirus, said.

"I didn't feel as comfortable as I would have liked with the swing, but the results were there so I was very pleased with the results. And honestly, if I can do that again tomorrow, I give myself a great chance to win."

Ancer is a further two strokes back following a three-under 67, the same score Scottie Scheffler and Ian Poulter both managed to sit just behind the Mexican on 13 under.

Dustin Johnson may still hold out hope of triumphing, with a round of 65 enough to be one of four players on 11 under par.  He is joined by Paul Casey, Will Zalatoris and Louis Oosthuizen.

Defending champion Justin Thomas already faced a battle to retain his crown, and the American was only able to shoot 69 on day three.

At seven under for the event, a repeat of his 2020 triumph appears almost impossible, considering he is so far back and the number of players ahead of him.

Harris English heads into the weekend at the WGC-FedEx St. Jude Invitational with a two-stroke lead after maintaining his spot atop the leaderboard Friday.

The American followed Thursday's 62 with a five-under-par 65 at TPC Southwind, where he won his first PGA Tour title eight years ago. 

Australia's Cameron Smith and Abraham Ancer of Mexico surged into a tie for second place after carding 62s of their own in Memphis to sit at 11 under for the tournament.

Ian Poulter (66), Scottie Scheffler (65) and Sam Burns (64) are three back of the lead at 10 under, while Louis Oosthuizen (64) and Bryson DeChambeau (66) are well within striking distance at nine under. 

English started on the back nine and made three birdies going out before carding his first and only bogey of the day at the par-four second hole. But he managed to follow that disappointment with an eagle on the third before adding one more birdie later in his round.

Smith also eagled the third on the way to tying a PGA Tour record, as he needed just 18 putts to complete his bogey-free round. 

That included a two-put at the last, not long after Smith figured out he was on the verge of history. 

"I was walking down 17 and was counting my putts up and I thought, 'No, that can't be right,'" Smith said. 

Further down the leaderboard, defending champion Justin Thomas (67) is seven strokes back of the lead at six under along with two-time major winner Dustin Johnson (65).

Phil Mickelson (66) is at five under, whie Hideki Matsuyama (69) and Patrick Reed (69) are well back at three under. 

Rory McIlroy (66), Sergio Garcia (68), and Collin Morikawa (71) are at two under, one stroke better than Brooks Koepka (69). 

Jordan Spieth (69) enters the weekend at even par and Olympic champion Xander Schauffele (73) is at two over.