World number one Scottie Scheffler is still struggling to move past his arrest last month at the PGA Championship, despite charges being dropped.

The American is preparing for the upcoming Memorial Tournament at Muirfield Village Golf Club in Ohio, though the events at the last major remains on his mind.

Scheffler was arrested after play was delayed at Valhalla Golf Club due to a traffic incident outside the course, with one person left dead from the incident, which did not involve the golfer.

It later emerged the American had been charged with second-degree assault of a police officer, third-degree criminal mischief, reckless driving and disregarding traffic signals from an officer.

An American court dismissed Scheffler's charges just 12 days later but the incident continues to trouble him.

"I would say that I still wouldn't have 100 per cent moved past it," Scheffler said. 

"Because now it's almost more appropriate for people to ask me about the situation and, to be honest with you, it's not something that I love reliving, just because it was fairly traumatic for me being arrested going into the golf course.

"It's not something that I love talking about and it's something that I'm hoping to move past, but when the charges are dropped, that's kind of only the beginning of getting past it, if that makes sense.

"It was definitely a bit of a relief, but not total relief because that's something that will always, I think, kind of stick with me. That mugshot I'm sure is not going anywhere any time soon."

Scheffler's attorney Steve Romines confirmed his client would not file a civil lawsuit after charges were dropped.

"I did not want to have to pursue legal action against Louisville because, at the end of the day, the people of Louisville are then going to have to pay for the mistakes of their police department and that just doesn't seem right," Scheffler said.

"So at no point did I ever want to sue them, but if it came there, I think my lawyer was more than prepared to use that as more of like a bargaining chip-type thing more than anything.

"I think sometimes in society people are expecting perfection out of everybody and just because somebody will make one mistake, people will crucify them for that and I've never really believed in that.

"I believe in forgiveness, I believe in grace and I try to give that out as much as possible because of how much grace I've been given."

Billy Horschel secured victory at the Memorial Tournament on Sunday, shooting an even-par 72 to finish four strokes ahead of Aaron Wise.

Horschel had a healthy buffer at the start of play on Sunday with a five-shot lead and kept it relatively steady, but had to come up with some big shots on the back nine to take the win.

After a bogey on the sixth, the 35-year-old got back to even with a birdie on the par-three 10th.

A bogey on the 12th took him back to one-over, yet a massive put on the par-five 15th for eagle gave Horschel a commanding lead.

It effectively shut the door on Wise, who had also birdied on 15, before he closed out the round with a bogey for a one-under 71.

It was Horschel's seventh tournament win on the PGA Tour, but his first with his family present. Greeted by them and tournament founder Jack Nicklaus after the win, Horschel spoke of the added significance of this triumph.

"It's special, it truly is," Horschel said after his round. "Jack's a legend of the game and to win his event, you've seen the guys who have won this event, just legends in their own right, it's pretty special.

"We joke about it in the family but my wife and my kids have never been to any of my victories. My parents have, and so, having a five-shot lead knowing that this was mine to sort of go out and win or lose, and having them here, I really wanted to win."

Horschel moved into the FedEx Cup's top 10 with the win, just 19 points behind Jon Rahm in ninth.

Excluding the 2021 WGC Match Play, defeating Scottie Scheffler in the final, this win is his first on the PGA Tour in a regular four-round format since the 2018 Zurich Classic.

Coming into Sunday with that five-stroke lead, Horschel was determined to maintain rather than extend that margin.

"I've watched Tiger play enough, and I wasn't around when Jack was playing in his heyday, but you knew he was unbelievable at course management," he said.

"He knew how to plot his way around a golf course and learn from those two, and understand, when you have a lead, you don't have to do anything special. You've just got to make sure you don't give any shots back.

"I did give some back and I was a little upset about it, but we just put the ball on the green, two-putting, trying not to do anything special and if I had to do something special, then I was ready for it. That eagle on 15 was huge."

Billy Horschel shot a blistering seven-under 65 on Saturday to secure a five-stroke lead heading into the final round of the Memorial Tournament.

Horschel shot another bogey-free round on Saturday to extend his streak to 44 consecutive holes, with his last coming on the 10th hole in the first round.

One year after Jon Rahm built a six-stroke lead coming into the Sunday at the Memorial, before having to withdraw due to a positive Covid-19 test, Horschel will have a chance to see off the field with a healthy buffer.

After chipping in for birdie on the opening hole, Horschel played incisively from there as the course firmed, zeroing in on the pin and not leaving himself with much work on the greens at Muirfield Village.

The 35-year-old will be going for his seventh tournament win on the PGA Tour, with his last victory coming at the 2021 WGC Match Play, defeating Scottie Scheffler in the final.

World number three Cameron Smith commenced with a one-stroke lead on Saturday but started slowly with bogeys from the bunker on the opening two holes.

He recovered from another bogey to open the back nine to finish on even par for the round, remaining on eight-under for the tournament.

The Australian is tied for second with Aaron Wise, who steadied after a fast start on the front nine to score a three-under 68 on Saturday.

A three-way tie for third between Daniel Berger, Francesco Molinari and Jhonattan Vegas sits a further stroke back.

Meanwhile, defending champion Patrick Cantlay sits on six-under along with another four players.

Cameron Smith continued his strong start to the Memorial Tournament on Friday, sitting alone atop the leaderboard on eight under after being one of three players to shoot under 70 on back-to-back days.

The Australian was in a six-way tie for the lead after round one, and pushed on well his second time around, finishing with just one bogey – on the sixth hole – which was sandwiched by birdies on the fifth and seventh.

Smith then birdied the par-five 11th, and the par-three 12th, showing his impressive touch over long and short distances, but where he really made his money was around the greens.

According to Data Golf, Smith had negative strokes-gained off the tee and with his approach shots in round two, but was second overall in strokes-gained around the greens (plus 3.55), trailing only Beau Hossler (plus 4.25). They gapped the field, with nobody else gaining more than plus 2.83 in that shot category.

Sitting one stroke off the lead is American Denny McCarthy and South Korea's Lee Kyoung-hoon, while one stroke further back at six under are round one's joint-leaders Davis Riley, Cameron Young and Luke List, along with Jhonattan Vegas and Billy Horschel.

McCarthy and Vegas joined Smith as the only players to shoot sub-70 in the opening two rounds.

Rory McIlroy headlines the group at five under in a tie for ninth, along with Francesco Molinari, still well within striking distance heading into the weekend.

A strong international group is at four under, including Canada's Mackenzie Hughes, Chile's Joaquin Niemann and South Korea's Im Sung-jae, and they are one stroke ahead of Ireland's Shane Lowry, Mexico's Abraham Ancer and American Will Zalatoris.

Jon Rahm and Corey Conners will still feel like they have a chance at two under, Max Homa and Xander Schauffele finished well inside the cut-line at one under, and Jordan Spieth shot a disappointing 74 on Friday to take an even par score into the weekend.

England's Aaron Rai – who was number one in strokes-gained off the tee on Friday – along with Australian Adam Scott finished right on the cut-line, making it through at two over, but Matt Fitzpatrick (three over) and Collin Morikawa (four over) were not so lucky.

World number three Cameron Smith headlines a six-way tie atop the Memorial Tournament leaderboard after Thursday's first round at Muirfield Village.

Smith is joined by American trio Luke List, Cameron Young and Davis Riley, as well as Canada's Mackenzie Hughes and South Korea's Lee Kyoung-hoon.

It is the largest leading group after the first round in tournament history, but they all got to their five-under 67 in different ways. 

Young finished the day second in average driving distance (316.8 yards), behind only Jon Rahm, while Lee, Hughes and Smith finished top-six in putts-per-green-in-regulation.

List was the only member of the leading group to finish with less than two bogeys, and Riley played an all-round game; top-15 in driving distance while being dialled in with his putter down the back-nine, going five-under from the 11th hole to the 17th.

US PGA Championship runner-up Will Zalatoris is part of the three-man group one stroke off the lead, while Max Homa and Canada's Corey Conners are in the logjam at three under.

A star-studded group finished with a two-under 70, including Rory McIlroy, Jordan Spieth, Xander Schauffele and Im Sung-jae, while Chile's Joaquin Neimann is with Collin Morikawa and Jason Day at one under.

Patrick Cantlay and Rahm were even-par, Mito Pereira will need a solid second round to make the cut after a one-over finish, and Hideki Matsuyama was handed his first career disqualification for using a wood with paint on its face – deemed illegal. He was three over at the time of the incident.

Hideki Matsuyama was disqualified from the Memorial Tournament midway through his first round on Thursday after breaching PGA Tour equipment regulations – the first disqualification of his career.

The 2021 Masters champion had just finished the ninth hole of a thus-far disappointing outing in Ohio, and would have made the turn at three-over after making three early bogeys. 

But Matsuyama, who won his first PGA Tour title at the 2014 edition of the tournament, was informed on the 10th tee that markings on the face of his three-wood breached equipment regulations.

Images showed what appeared to be white paint on the club face, which he used throughout his short outing on the course, leading chief referee Steve Rintoul to describe the club as "non-conforming".

Rintoul grouped with other officials to deem the three-wood in breach of equipment rule 4.1a, which states "a substance or any treatment can't be applied to the face of a club which could influence the flight of the ball, the spin, the loft or anything on the ball, how the ball performs".

The 30-year-old, who had never previously been disqualified in his nine-year professional career, refused to comment after being barred from completing his round.

Matsuyama tied for 14th in his unsuccessful defence of hi Masters title, having recovered from a neck injury to feature in Augusta, and will look to bounce back at the Canadian Open, which starts next Tuesday.