Rory McIlroy has expressed his disappointment at the players who performed a U-turn to join the Saudi-backed LIV Golf Series, as he conceded being the poster boy of the PGA Tour was a “burden” he could do without.

McIlroy felt the proposed rebel circuit was “dead in the water” after Dustin Johnson and Bryson DeChambeau committed their futures to the PGA Tour in the wake of Phil Mickelson’s explosive comments about the Tour and Saudi Arabia being published in February.

In an interview with the author of a recently published biography, Mickelson admitted he was fully aware of Saudi Arabia’s “horrible record on human rights”, including the murder of Washington Post reporter Jamal Khashoggi, but was using the threat of a breakaway to “reshape” how the Tour operates.

Phil MickelsonPhil Mickelson ponders a question at a press conference ahead of the US Open (Robert F Bukaty/AP)

LIV Golf chief executive Greg Norman said the organisation’s full league of 14 events had been ready to launch until Mickelson’s comments cost him several sponsors and resulted in some players backing out, with eight 25million US dollar events scheduled this year instead.

Mickelson and Johnson were among the field for the first of those at Centurion Club in Hertfordshire last week, with DeChambeau announcing he had joined LIV Golf during the second round.

“I guess I took a lot of players’ statements at face value. I guess that’s what I got wrong,” McIlroy said ahead of the 122nd US Open at Brookline.

“You had people committed to the PGA Tour, and that’s what the statements were that were put out. People went back on that.

“It’s disappointing. The players that are staying on the PGA Tour feel slighted in some way. If those guys (who have left) thought outside of themselves, they would see this is not the best for everyone.

“My dad said to me a long time ago, once you make your bed, you lie in it, and they’ve made their bed. That’s their decision, and they have to live with that.”

Asked specifically if he had lost respect for six-time major winner Mickelson, whose victory in the US PGA Championship last year made him the oldest major champion ever, McIlroy said: “As a golfer? No.

“He won a major championship 13 months ago, probably one of the crowning achievements of his career and one of the most impressive achievements in the history of the game of golf. As a golfer, I have the utmost respect for Phil.

“I’ve been disappointed with how he has went about what he has done, but I think he has come back and shown some remorse about how he has handled some things so I think he has learned from that.”

McIlroy and Justin Thomas have emerged as the staunchest advocates of the PGA Tour and, a day after the 54-hole LIV event came to an underwhelming conclusion, they fought out the RBC Canadian Open in a thrilling finish, with McIlroy eventually defending his title in front of a raucous crowd.

It was the 21st PGA Tour victory of McIlroy’s career – one more than Norman – and prompted McIlroy to take a swipe at the Australian which he admitted at Brookline was a “little bit petty”.

But the four-time major winner feels he has a duty to speak out about a subject he feels is “fracturing the game more than it already is”.

“It’s certainly a burden I don’t need but I have very strong opinions on the subject,” McIlroy said. “I think I am providing the thought process for a different view shared by a lot of people.

“The PGA Tour was created by people and tour players that came before us – the likes of Jack Nicklaus, Arnold Palmer…

“They created something and worked hard for something, and I hate to see all the players that came before us and all the hard work that they’ve put in just come out to be nothing.

Rory McIlroyRory McIlroy (front right) teed off on the 16th hole as Justin Thomas (centre) and Tony Finau looked on during the final round of the Canadian Open (Nathan Denette/The Canadian Press via AP)

“Legacy, reputation… at the end of the day that’s all you have. You strip everything away, and you’re left with how you made people feel and what people thought of you. That is important to me.

“The crowds in Canada, LIV is never going to have that, the sense that it means something. What they are doing over there does not mean anything, apart from collecting a ton of money.”

World number two Jon Rahm made it clear that the LIV format of 54 holes, with no cut and a shotgun start “is not a golf tournament” and echoed McIlroy’s view that history and legacy outweigh money.

But he admitted he was concerned about the future of the Ryder Cup, with the DP World Tour yet to say whether they will ban or suspend players competing in LIV events, thereby making them ineligible for the biennial contest.

Jon RahmJon Rahm (left) celebrated his birdie on the 16th as partner Sergio Garcia looked on in the 2021 Ryder Cup at Whistling Straits (Anthony Behar/PA)

“I hope the Ryder Cup doesn’t suffer,” said Rahm, whose team-mate and fellow Spaniard Sergio Garcia has joined the breakaway league. “It’s an event we all play for free, and it’s one of our favourite weeks, win or lose.”

In a memo to players seen by Golf Channel, chief executive Keith Pelley addressed the issue of why the DP World Tour had not copied the PGA Tour in suspending those who competed at Centurion without permission.

“While I understand the frustration, I remind you all that although we work closely with the PGA Tour, we are different organizations and our rules and regulations are therefore different too,” wrote Pelley, who said a decision would be made on June 23, the entry deadline for the co-sanctioned Scottish Open.