England’s Paul Casey, ranked 26th in the world, has become the latest player to join the Saudi Arabia-funded LIV Golf Invitational.

Casey has won 21 times as a professional, including three times on the PGA Tour and another 15 on the European Tour. He also represented Team Europe five times in the Ryder Cup.

A back injury has kept Casey sidelined since he took part in the WGC Match Play Championship in March. He played two holes of his opening match when he conceded due to back spasms, before withdrawing from the Masters, PGA Championship and U.S. Open.

He plans to make his LIV debut later this month at the Trump National Golf Club in Bedminster, New Jersey.

Casey joins a growing list of players to accept PGA Tour bans and join the breakaway series, fronted by CEO Greg Norman and funded by Saudi Arabia’s sovereign wealth fund.

Dustin Johnson, Brooks Koepka and Phil Mickelson are some of the marquee names that have come on board with the promise of big signing bonuses, hefty prize purses and an eased schedule.

J.T. Poston holds a three-stroke lead heading into the final round of the John Deere Classic after shooting a four-under 67 on Saturday.

Trying to complete a wire-to-wire victory after tying for second last weekend at the Travelers Championship, Poston sits on 19-under after 54 holes at TPC Deere Run.

The 29-year-old started strongly with three birdies on the front nine, but suffered a blip on the closing nine holes, with a birdie on 14 softening the blow of bogeys on 12 and 15.

He recovered to take momentum into Sunday with an eagle on the par-five 17th, forcing his way past the bunkers on his approach to the green to then one-putt and restore breathing room from the chasing pack.

Despite the solid form coming into this weekend in Silvis, Poston's lone win on the PGA Tour came in 2019, taking out the Wyndham Championship.

He leads a three-way tie for second between Scott Stallings, Denny McCarthy and Emiliano Grillo, who birdied four of the last five holes on Saturday to finish on 16-under.

Out of the top four players on the leaderboard, McCarthy is the lone player not to have won a tournament on the PGA Tour, with Stallings and Grillo's last wins coming in 2014 and 2015 respectively.

Trailing them is Callum Tarren on 15-under, with Bo Hoag and Chris Naegel tied for sixth on 14-under.

Hoag, the world number 524, was Saturday's big mover with a third-round score of eight-under, opening the first four holes with two birdies and an eagle.

He more than compensated for his solitary bogey on 15 with birdies on 14, 16 and 17 to finish with the day's lowest score.

J.T. Poston continued his terrific run of form on Friday to extend his lead to four strokes at the John Deere Classic, sitting at 15 under through 36 holes.

Coming off a second-place finish at the Travelers Championship last week, Poston shot Thursday's round of the day with a 62, and followed it up with a 65. Only six players had better rounds on Friday, with Maverick McNealy the sole 63.

Through two rounds, Poston now has 14 birdies, one bogey and one eagle.

In outright second place is Denny McCarthy, with rounds of 66 and 65, including going bogey-free on his second trip around the course to head into the weekend at 11 under.

The rest of the top-10 has strong international representation, with Austria's Matthias Schwab and Argentina's Emiliano Grillo part of a four-way tie for third place at 10 under, while Taiwan's C.T. Pan, England's Callum Taren and Canada's Michael Gligic are a further shot back in the log-jam at nine under.

South Africa's Christiaan Bezuidenhout and Canada's Adam Svensson are at eight under, America's Charles Howell III is at seven under, while India's Anirban Lahiri and Australia's Cam Davis highlight the large group at six under.

After narrowly missing out on a win at the Travelers Championship last weekend – losing due to a double-bogey on the 72nd hole – Sahith Theegala finished right on the cut-line at three under, highlighting the friendly scoring conditions.

John Huh missed out on the weekend's play by one stroke, Webb Simpson finished one under, and Cameron Champ missed the cut by three shots at even par.

DP World Tour chief executive Keith Pelley has hit back at LIV Golf rebels and says sanctions imposed on players were "proportionate and fair".

Lee Westwood and Ian Poulter were among 16 DP World Tour members who were last week fined £100,000 and banned from playing in three events – the first being the Scottish Open next week.

They were sanctioned by the DP World Tour for playing in the inaugural LIV Golf Invitational Series event at Centurion Club without permission last month.

In an open letter, which was addressed to Pelley, published by The Telegraph, the 16 players threatened to take legal action against the DP World Tour if the fines and suspensions were not rescinded.

They also claimed that the DP World Tour is playing "second fiddle" to the PGA Tour in an extended relationship between the two.

Pelley provided a strong response as he refused to back down on Friday.

He said in a statement: "There has been a leak to the media of a letter we received on behalf of a number of LIV Golf players which contains so many inaccuracies that it cannot remain unchallenged.

"Before joining LIV Golf, players knew there would be consequences if they chose money over competition. Many of them at the time understood and accepted that. Indeed, as one player named in the letter said in a media interview earlier this year; 'If they ban me, they ban me.' It is not credible that some are now surprised with the actions we have taken.

"The letter claims that these players 'care deeply' for the DP World Tour. An analysis of the past participation statistics on our Tour in recent years of several of the leading players named suggests otherwise

"One player in particular named in the note has only played six Rolex Series events in the past five years. Another one, only four. I wish many of them had been as keen to play on our Tour then as they seem to be now, based on the fact they have either resigned their membership of the PGA Tour or, if they are still in membership, have been suspended indefinitely.

"Furthermore, given how deeply these players say they care about the DP World Tour, perhaps some of them could have played in Ireland this week in support of our new title sponsor, in particular one player who gave us a signed commitment to play at Mount Juliet.

"With that player currently in action at Pumpkin Ridge, you can imagine the allegation in the letter that we are in the wrong, is hard to accept.

"We also take great exception to an allegation made near the end of the letter which states we are somehow playing 'second fiddle' to the PGA Tour. Nothing could be further from the truth.

"We held a player meeting in Ireland on Tuesday where we outlined in great detail all the many benefits of our expanded relationship with the PGA Tour.

"One of those is an unprecedented ten cards on offer to the PGA Tour, cards that many of the players named in this letter desperately wanted to attain in the early stages of their careers. Why now be critical of those trying to do the same?

"The letter also expresses supposed concern about the future of the DP World Tour. Rest assured no-one should have any worries on that score.

"The DP World Tour is a vibrant, independent and global Tour with increasing and guaranteed prize fund growth over the next five years. We have fantastic tournaments across the year including a host of wonderful national Opens, all played in front of huge crowds, illustrated perfectly by this week's Irish Open.

"Finally, it would not be appropriate for me to comment on any potential legal matters.

"I will simply reiterate that our Members' Regulations which have been in force for more than 30 years, have been accepted by all the players, are there to protect all of our members, and we will use them to take all necessary steps to protect their interests.

"The sanctions for those members who knowingly broke our rules by playing at the Centurion Club without a release are proportionate, fair and, I believe, considered necessary by the majority of our members."

American J.T. Poston played a near-flawless opening round at TPC Deere Run to lead the John Deere Classic by two strokes after Thursday's action.

Poston, who was one career PGA Tour win back at the Wyndham Championship in 2019, is arguably in career-best form at the moment after finishing tied for second in last week's Travelers Championship. He also finished tied for third at the Wells Fargo Championship, and collected another top-10 at RBC Heritage. 

He posted seven birdies, and an eagle on the par-five second hole, in his bogey-free round, finishing with a nine-under 62.

Speaking to the media afterwards, Poston said he can feel himself in a groove.

"I think it's starting to kind of come together and see the results and see the shots, and kind of building that confidence back into my ball striking," he said.

"Hit my irons really well and hitting a lot of fairways, so I'm able to kind of attack some of the pins. Really, just hitting a lot of greens, which is something I haven't done in the first part of the year.

"It's obviously been the secret I guess, so hopefully keep it going."

In outright second place is Canadian Michael Gligic, who also went bogey-free, draining seven birdies for his seven-under 64.

Vaughn Taylor and Christopher Gotterup are tied for third at six under, while the group of Ricky Barnes, Denny McCarthy, Chris Naegel and Dylan Frittelli sit tied for fifth at five under.

A log-jam at four under features Austria's Matthias Schwab, Canada's Adam Svensson and American Scott Stallings, while Australian Cam Davis and Argentina's Emiliano Grillo are one further shot back.

Cameron Champ and India's Anirban Lahiri are at two under, Maverick McNealy and Rory Sabbatini are one under, and Webb Simpson is the pick of the players at even par.

There will be some high-profile debutants when the first LIV Golf Invitational Series event to be staged in the United States starts on Thursday.

Three weeks after the inaugural LIV competition at the Centurion Club, near London, took place, 48 players have headed to Portland to tee off at Pumpkin Ridge Golf Club.

A trio of major champions will appear in the controversial Saudi-backed breakaway league for the first time in Oregon.

Stats Perform takes a look at the standout new faces who have turned their back on the PGA Tour to make their bows in a three-day LIV Golf Invitational Portland tournament that consists of 12 teams.

BROOKS KOEPKA

Brooks Koepka is the biggest name to have signed up since his fellow Americans Dustin Johnson and Phil Mickelson played in the opening event in England.

The four-time major winner will captain a SMASH GC side that includes his brother, Chase, this week.

Koepka had tried to fend off questions about whether he would jump ship from the PGA Tour to commit to LIV Golf ahead of the recent U.S. Open.

"I haven't given it that much thought," he said when asked if he could sign up for a lucrative deal to play on the new tour. "I don't understand. I'm trying to focus on the U.S. Open, man. I legitimately don't get it. You can’t drive a car looking in the rearview mirror, can you?"

Just a fortnight on, the former world number one said in a tense press conference two days before his LIV bow: "My opinion changed. That was it.

"You guys will never believe me, but we didn't have the conversation 'til everything was done at the U.S. Open and figured it out. Here I am."

He added: "Look, what I've had to go through the last two years on my knees, the pain, the rehab, all this stuff, you realise, you know, I need a little bit more time off. I'll be the first one to say it, it's not been an easy last couple of years, and I think having a little more breaks, a little more time at home to make sure I'm 100 per cent before I go play in an event and don't feel like I'm forced to play right away - that was a big thing for me."

BRYSON DECHAMBEAU

Bryson DeChambeau is another major champion who has defected from the PGA Tour.

DeChambeau starts a new chapter of his career on the back of finishing tied for 56th in the U.S. Open, two years after winning it. 

The 28-year-old will also have captaincy duties, leading the CRUSHERS GC team.

DeChambeau has not registered a victory since his Arnold Palmer Invitational win last year and will be hoping a change of tour will enable him to experience that winning feeling again.

He said of his decision to join LIV Golf: "I understand people's decisions on their comments and whatnot. As it relates to me, I've personally made that as my own decision and I won't say anymore on that, there's no need. We're golfers at the end of the day.

"I think that I respect everyone's opinion. That's the most important thing people can hopefully understand out of me, that I do respect it. But golf is a force for good, and I think as time goes on, hopefully people will see the good that they're [LIV Golf] doing and what they're trying to accomplish, rather than look at the bad that's happened before. 

"I think moving on from that is important, and going, continuing to move forward in a positive light is something that can be a force for good for the future of the game."

PATRICK REED

The 2018 Masters champion Patrick Reed will also get his first experience of the LIV Golf Invitational Series this week.

Another United States Ryder Cup player, Reed will be on a 4 ACES GC team captained by Johnson.

Reed's last victory came at the Farmers Insurance Open in 2021 and he was down in a share of 49th in the U.S Open.

The 31-year-old took aim at the PGA Tour this week, saying he is looking forward to having a reduced workload.

"Listen to the players for once," he said. "We actually have an off-season where not only can we get healthy, work on our bodies, but we're basically allowing ourselves throughout the year to, you know, try to peak at the right times is when you're playing rather than feeling like you have to play every single week.

"And on top of it, just the quality of life for us as players now, having less events, being able to spend more time at home with the family, if you have kids, being able to spend time with your children, and not sitting there and having to play three, four weeks in a row, then have a week off, and during that week off you're preparing trying to get ready for the next week."

Brooks Koepka has no issue with Rory McIlroy's criticism of his decision to join the LIV Golf Invitational Series, a move he said was taken to allow more flexibility over his schedule.

Former world number one Koepka had previously stated his allegiance to the PGA Tour and commented in February that "somebody will sell out and go for it".

Koepka was not involved in the first event at Centurion Club earlier this month and was critical of reporters for casting a "black cloud" over the U.S. Open when players were probed about the controversial Saudi-backed series, which has been accused of sportswashing.

However, the four-time major winner has now signed up for the breakaway series and will tee off in Portland this week, joining the likes of Dustin Johnson, Bryson DeChambeau and Phil Mickelson in doing so.

When asked about Koepka's decision last week, McIlroy said: "Am I surprised? Yes, because of what he [Koepka] said previously. That's why I'm surprised at a lot of these guys, because they say one thing and then they do another. It's pretty duplicitous on their part to say one thing and then do another thing."

Asked about McIlroy's comments, Koepka replied: "Look, I've got respect for Rory as a player. He's good. He's phenomenal. 

"I'll be honest with you, I didn't see it. I didn't hear about it until basically like a day ago. So, look, he's entitled to his opinion. He can think whatever he wants. He's going to do what's best for him and his family, I'm going to do what's best for me and my family, and I can't hate on anybody for that."

Koepka insists he had not made a decision until after the U.S. Open. Asked what had changed since, he said: "Just my opinion, man. My opinion changed. That was it. 

"You guys will never believe me, but we didn't have the conversation 'til everything was done at the U.S. Open and figured it out and just said I was going to go one way or another. Here I am."

Koepka has slid down to world number 19 after contending with a series of injuries to his hip, knee and wrist.

The 32-year-old believes signing up to the LIV series will allow him more time to recover physically.

"What I've had to go through the last two years on my knees, the pain, the rehab, all this stuff, you realise, you know, I need a little bit more time off," Koepka said. 

"I'll be the first one to say it, it's not been an easy last couple of years, and I think having a little more breaks, a little more time at home to make sure I'm 100 per cent before I go play in an event and don't feel like I'm forced to play right away [is good]."

Asked about accusations of sportswashing levelled against the series, Koepka replied: "You know, we've heard it. I think everybody has. It's been brought up.

"But, look, like we said, our only job is to go play golf, and that's all we're trying to do. We're trying to grow the game, do all this other stuff. And we're trying the best we can."

While several players have resigned their PGA Tour membership, including fellow defector Patrick Reed, Koepka has not done so as yet.

It remains to be seen long term what decisions will be taken by the major championships over the participation of players who have jumped ship to LIV Golf.

Koepka insists he is comfortable with whatever outcome occurs.

"You play anywhere around the world, you'll be just fine. You'll get into them. I made a decision. I'm happy with it, and whatever comes of it, I'll live with it," he said.

Xander Schauffele was the beneficiary of an 18th-hole double-bogey from leader Sahith Theegala, going on to win the Travelers Championship by two strokes with a birdie at the last.

Schauffele finished the tournament at 19 under with rounds of 63, 63, 67 and finally a 68 on Sunday as wind picked up and the scoring conditions worsened.

The win is the sixth of his PGA Tour career and his first singles win since January 2019, also collecting the Zurich Classic of New Orleans in a team format with Patrick Cantlay in April of this season.

It was Theegala controlling the final stages after he moved to 19 under and the outright lead with birdies at 13, 15 and 17 down the stretch, but after finding the fairway bunker on 18, he muffed his first attempt to get out, requiring another two shots to get to the green, before his bogey putt lipped out.

It meant Schauffele only needed par to claim the championship, and he went one better, finishing in style with a perfect drive, approach and putt for birdie.

Speaking on the 18th green after his winning putt, he said it felt incredible to convert a 54-hole lead for the first time in his career.

"It's incredible," Schauffele said. "I was looking at birdie just to get into a play-off and saw there was a bit of a hiccup with Sahith when I was standing on the tee.

"I knew I had to hit that fairway and hit it anywhere on the green to make par."

Theegala finished tied for second at 17 under along with J.T. Poston, who was one of three players to shoot 64 or better on Sunday (also Chesson Hadley and Scott Stallings).

In outright fourth was Michael Thorbjornsen following a week he will never forget, finishing at 15 under after being the only amateur to make the cut, closing his week with rounds of 65, 66 and 66 to make a statement about his future on the PGA Tour.

Hadley held outright fifth place at 14 under, going bogey-free with four birdies and an eagle for his 64, while Keith Mitchell and Kevin Kisner shared sixth place at 12 under, with Kisner carding a disappointing 71 on Sunday to take himself out of contention.

The round of the day came from Stallings, who went bogey-free with seven birdies for his 63, rounding out the top 10 in a tie for eighth along with Brian Harman, Chez Reavie, William McGirt and Nick Hardy.

A star-studded group finished tied for 13th at 10 under, featuring world number one Scottie Scheffler, number six Cantlay and fellow top-20 American Tony Finau. It was tough work for the stars, with an even par 70 for Scheffler on Sunday, while Cantlay entered the day one stroke off the lead and carded a 76.

Rory McIlroy and recent winner Lee Kyoung-hoon were in the group that completed out the top 20.

Xander Schauffele shot a three-under 67 on Saturday to take a one-stroke lead over Patrick Cantlay, coming into the final round of the Travelers Championship.

Looking for his sixth individual title on the PGA Tour, the reigning Olympic champion began the day with a five-stroke lead and went two-under over the front nine to help set up a career-best run of 48 holes without a bogey.

Schauffele hit trouble and a briefly fell into a tie for the lead on the par-five 13th, though, finding the water with his tee shot to eventually finish with a bogey.

He recovered to retake the solo lead however, claiming birdies on the 16th and 17th hole, hitting the pin on his approach and one-putting on the latter.

Schauffele leads by a solitary shot on 17-under from close friend Patrick Cantlay, who charged up the leaderboard on Saturday with a bogey-free, seven-under 63.

The two formed a close bond after being paired at the 2019 Presidents Cup and along with pairing up again at the Ryder Cup, took out this year's Zurich Classic together.

The reigning FedEx Cup champion will be looking to claim his first individual title of 2022, though, after losing in playoffs this year to Scottie Scheffler and Jordan Spieth at the Phoenix Open and the Heritage respectively.

Sahith Theegala is three strokes back from Schauffele on 14-under after posting a six-under 64 on Saturday, even after a bogey on the par-four 18th.

The 24-year-old was otherwise in fine touch over the back nine in Cromwell, with an eagle on the 13th in contrast to the leader accompanied by three birdies.

Yet to win a tournament on the PGA Tour, Theegala is followed by Kevin Kisner on 13-under, then a tie for fifth between Martin Laird and KH Lee on 12-under.

Xander Schauffele shot his second consecutive 63 to head into the weekend at the Travelers Championship at 14 under – five strokes clear of the chasing pack.

Remarkably, Schauffele is yet to post a bogey in the tournament, with 14 birdies and 22 pars through his 36 holes.

He started beautifully in his second trip around TPC River Highlands, birdieing three of his first five holes, and capped off his round by birdieing the picturesque 17th hole for the second day in a row.

Schauffele was one stroke behind J.T. Poston and Rory McIlroy after Thursday's action, and tied for the round of the day on Friday along with Harold Varner III.

At 14 under, Schauffele has tied the TPC River Highlands 36-hole record, and it ties him with Justin Rose back in 2010 for the lowest 36-hole score at the Travelers Championship since 1984.

The five-man group tied for second place at nine under is made up of Americans Patrick Cantlay, Harris English, Nick Hardy and Kevin Kisner, as well as Australia's Cam Davis. Hardy and Kisner were the pick of that group on Friday, shooting 64s.

McIlroy and Poston sit one shot further back at eight under after the first-round leaders both shot even-par 70s, and are joined at eight under by a group including Lee Kyoung-hoon and Matthew NeSmith.

Webb Simpson is at seven under, rounding out the top-20, along with Michael Thorbjornsen, who is the only amateur to make the cut after rounds of 68 and 65.

World number one Scottie Scheffler is at five under, along with Varner, with the pair taking very different routes to that number. Scheffler has been consistent, with a 68 and a 67, while Varner has been the opposite, following his opening 72 with a 63.

With the cut-line at two under, Danny Willett and Mito Pereira were two of the players to miss out on the weekend despite being under par, while Sam Burns finished his week even, Jordan Spieth was one over, and the talented duo of Rickie Fowler and Joaquinn Neimann were at three over.

The DP World Tour has announced sanctions against players who have broken away to join the Saudi-backed LIV Golf Invitational Series.

A host of golfing stars have committed to the controversial series, with Phil Mickelson among them, and sanctions handed out to DP World Tour members on Friday included fines of £100,000 and suspension from two upcoming events.

Players have been warned they risk being banned from PGA Tour tournaments if they compete in LIV Golf, and the DP World Tour has now confirmed its own sanctions.

In a statement, it said: "The DP World Tour today confirmed the sanctions to be taken against members who breached tour regulations and participated in a LIV Golf event at Centurion Club from June 9-11, despite not having received releases to allow them to do so.

"Such actions contravened the conflicting event regulation laid down in the members' general regulations handbook as well as the code of behaviour regulation, of which the members have been reminded on a number of recent occasions."

Alongside the fines, the sanctioned golfers have been suspended from competing at the Scottish Open and the Barracuda Championship, and warned that playing in further LIV Golf events could see them hit with additional punishments.

The DP World Tour – previously known as the European Tour – says money from the fines will be divided two ways, by being added to the prize fund for upcoming tournaments and distributed by the tour's Golf For Good programme.

Chief executive Keith Pelley highlighted a "strategic allegiance" with the PGA Tour, which has already banned players who competed at the Centurion Club.

"Every action anyone takes in life comes with a consequence and it is no different in professional sport, especially if a person chooses to break the rules. That is what has occurred here with several of our members," Pelley said.

"Many members I have spoken to in recent weeks expressed the viewpoint that those who have chosen this route have not only disrespected them and our tour, but also the meritocratic ecosystem of professional golf that has been the bedrock of our game for the past half a century and which will also be the foundation upon which we build the next 50 years.

"Their actions are not fair to the majority of our membership and undermine the tour, which is why we are taking the action we have announced today."

Rory McIlroy continued to lead the way both on and off the course, shooting a bogey-free eight-under 62 at the Travelers Championship on Thursday.

After defending his title at the Canadian Open for a 21st PGA Tour win a fortnight ago, following up with a top-five finish at the U.S. Open, McIlroy opened with five birdies over the front nine on the TPC at River Highlands course.

The most vocal of critics against the LIV Golf Invitational Series, the in-form Northern Irishman then closed with two birdies over the final four holes, including a birdie on the par-four 18th to punctuate a blistering opening round.

The birdies were flying at the opening day in Cromwell however, with JT Poston taking a share of the opening-round lead with an eight-under of his own.

They hold a one-stroke lead over Xander Schauffele, who closed with four birdies over the final six holes on Thursday to finish on a seven-under 63, tied for second with Scotsman Martin Laird.

Schauffele was in fine touch with his approach game, hitting the ball particularly cleanly and could have finished with an even lower score had he capitalised with his putter.

They were followed by a three-way tie for third, with Patrick Cantlay, Webb Simpson and Charles Howell III all posting scores of six-under in the opening round.

Meanwhile, Cam Davis and Matthew NeSmith share fourth place after the opening 18 holes, finishing on five-under for the round.

While others shone in Cromwell, Jordan Spieth had a tough day out for his opening round despite three birdies over the last five holes, finishing with a five-over 75 for the day.

He will have plenty of work to do on Friday just to make the cut, while world number one Scottie Scheffler posted a two-under 68.

Scottie Scheffler has admitted it was "definitely a surprise" to see Brooks Koepka join the breakaway Saudi-backed LIV Golf series as he reaffirmed his commitment to the PGA Tour.

Koepka became the latest big name to join the controversial LIV series this week, following the likes of Bryson DeChambeau, Patrick Reed and Abraham Ancer to join after its maiden event in London earlier this month.

Those moving have faced significant backlash for their decisions, with Rory McIlroy questioning the approach of the players on Wednesday, and while Scheffler was surprised, he stopped short of direct criticism.

"It was definitely a surprise for me. I was at a function with him last week and that definitely wasn't what we had in mind," he told a news conference.

"We were focused on building the PGA Tour and getting the guys that are staying here together and kind of just having talks and figuring out how we can help benefit the Tour, so to see Brooks leave was definitely a surprise for us.

"With that being said, he's made his decision, I'm not going to knock him for doing that."

The world number one also reaffirmed his own commitment to the PGA Tour and rebuffed any chances of him following in Koepka's footsteps.

"For me, it's not where I see myself heading anytime soon. I grew up wanting to be on the PGA Tour.

"I grew up dreaming of playing in these events, I didn't grow up dreaming of playing the Centurion Club in London or whatever it is. 

"I grew up wanting to play in the Masters, in Austin, at Colonial, the Byron Nelson.

"I wouldn't trade those memories for anything at this moment in time. Those memories to me are invaluable. 

"I would never risk going and losing the opportunity to go back to Augusta every year. 

"There's nothing I would want to do right now that would risk having any sort of effect on the way my life is now."

The PGA Tour has announced schedule changes and prize money increases in order to stem the flow of big-name players joining the rival LIV Golf International Series.

Brooks Koepka became the ninth major champion to sign up to the controversial Saudi Arabia-backed league, rocking the PGA Tour on Wednesday.

The American joined Sergio Garcia, Dustin Johnson, Phil Mickelson, Martin Kaymer, Graeme McDowell, Louis Oosthuizen, Charl Schwartzel and Bryson DeChambeau in the breakaway competition.

Defecting players were indefinitely suspended from PGA Tour events, but were allowed to play at last week's U.S. Open and participate in next month's 150th Open at St Andrews.

The PGA had been rumoured to be mulling over a switch to a calendar-year schedule, alongside increased purses and the creation of new no-cut international events featuring the Tour's top 50 players.

Commissioner Jay Monahan confirmed those alterations at a press conference ahead of the Travelers Championship, stressing the PGA's need to innovate to remain golf's leading competition.

"I want to talk about where the PGA Tour is headed. We don't expect to overcome this current challenge by relying on our legacy and track record alone," he said.

"We've been on a path for a number of years to strengthen and evolve our product for the benefit of our fans and players alike, those plans are obviously accelerated in light of the current environment.

"We have some exciting developments coming out of yesterday's policy board meeting that will further secure our status as the pre-eminent golf tour in the world.

"This includes moving forward with our future product model for the 2022-23 season and beyond, a return to a calendar-year schedule beginning in 2024, with the FedEx Cup contested from January to August, culminating with the FedEx Cup play-offs and followed by the fall events.

"[The Tour will also add] revised field sizes for the FedEx Cup play-offs in 2023 and beyond, [and] the creation of a series of up to three international events, to be played after the conclusion of the fall schedule, which will include the top 50 players from the FedEx Cup points list.

"Alongside these changes, the policy board also amended the resource allocation plan, to increase purse sizes at eight events during the 2022-23 season, with an average purse at $20million. 

"There is more work to be done, and details to confirm, but implementing substantial changes to our schedule gives us the best opportunity to not only drive earnings to our players, but also improve our product and create a platform for continued growth in the future."

Rory McIlroy, a vocal opponent of LIV Golf, had earlier stated he supported the changes, saying to Sky Sports: "I think having the FedExCup season go to a calendar year, that would be a pretty good idea.

"So then it gives guys the opportunity to play if they want to play in the fall, or if they don't want to play in the fall they don't have to, they're not forced to.

"You're trying to give playing opportunities and create prize funds for the lower half of the membership, but also trying to accommodate what the upper half of the membership want as well with an off-season, time away from the FedExCup schedule. So it's a balance."

Monahan added the PGA could not wish to compete financially with the rival tour, headed by two-time major champion Greg Norman, which he described as "irrational".

"I am not naive," Monahan said. "If this is an arms race and if the only weapons are dollar bills, the PGA Tour can't compete with a foreign monarchy that is spending billions of dollars in an attempt to buy the game of golf.

"We welcome good healthy competition, the LIV series is not that. It's an irrational threat, one not concerned with the return on investment or true growth of the game. 

"Currently no one organisation owns or dominates the game of golf, instead the various entities work together to meet our own respective priorities but with the best interests of the game at heart.

"When someone attempts to buy the sport and dismantle the institutions that are intrinsically invested in growth and focus only on a personal priority, that partnership evaporates. 

"Instead we end up with one person, one entity, using endless amounts of money to direct employees towards their personal goals, which may or may not change tomorrow or the next day.

"I doubt that's the vision any of us have for the game."

Rory McIlroy labelled breakaway players joining the LIV Golf International Series as "duplicitous" before Brooks Koepka became the latest high-profile name to leave the PGA Tour.

McIlroy has been a critic of LIV Golf, the controversial Saudi-backed competition, with opponents accusing the breakaway league of sportswashing.

However, that has not stopped the likes of Dustin Johnson, Phil Mickelson, Bryson DeChambeau and Sergio Garcia leaving the PGA Tour, who have indefinitely banned the defectors from returning.

Koepka was confirmed on Wednesday as the next big name to join and is the ninth major winner to sign for LIV Golf, with world number 20 Abraham Ancer also being linked with the tournament.

Four-time major winner Koepka refused to discuss LIV Golf at last week's U.S. Open, where he said he was "tired of conversations" and debates were "throwing a black cloud" over the third major of 2022.

Koepka subsequently withdrew from the Travelers Championship, which is the next PGA Tour event on Thursday, and will feature at the second LIV Golf event in Portland.

That has led to more debate around the breakaway league, and McIlroy feels his fellow golfers are not staying true to their word.

"Am I surprised?" McIlroy told reporters in Connecticut before Koepka's switch was confirmed. "Yes, because of what he said previously.

"I think that's why I'm surprised at a lot of these guys because they say one thing and then they do another, and I don't understand that and I don't know if that's for legal reasons or if they can't – I have no idea.

"But it's pretty duplicitous on their part to say one thing and then do another thing…the whole way through, in public and private, all of it."

McIlroy has enjoyed an upturn in fortunes over the last month, triumphing at the Canadian Open before finishing in a tie for fifth at the U.S. Open.

The 33-year-old admitted that tiredness is becoming a factor as he prepares for his fourth tournament in as many weeks, but remains excited to compete at the Travelers Championship.

"I got a night in my own bed down in Florida on Monday night, which was really nice," he added.

"But, yes, I came back up here yesterday and played the pro-am today and going to get an early night tonight. I've got an early start again tomorrow.

"But excited to get going and especially continuing the run of form I'm on. I'm playing some really good golf and I want to continue trying to do that.

"I think the three weeks that I've played, like Memorial's a very demanding golf course. Canada wasn't so demanding but when you get yourself in contention and you play a weekend like that, then that takes quite a lot out of you. And then you follow that up with a US Open. So I think it's a combination of everything.

"Mentally I'm totally fine, but it will be nice to sort of rest up this afternoon and get another good night's sleep and get ready to play tomorrow.

"But four weeks in a row is pretty rare for me these days. I haven't played four in a row in a while and you start to remember why!"