World golf remains split on the divide between the PGA Tour and LIV Golf, yet United States Golf Association chief executive Mike Whan hopes to create a pathway for the breakaway players at the U.S. Open.

No permanent deal appears on the cards in the near future as the PGA and Saudi Arabia's Public Investment Fund (PIF), which funds the LIV circuit, held further talks last week.

Tiger Woods described the meeting as "productive" but just 12 LIV players will be in action when the U.S. Open starts on Thursday at Pinehurst.

Jon Rahm would have been the 13th if not for his withdrawal due to a troublesome foot injury as LIV representation remains sparse at golf's major events.

Whan wants to change the dynamic between the two competitions, however.

"I think we are serious about that," USGA chief Whan said when asked about creating a link between LIV and the U.S. Open. 

"Exactly what that looks like, I'm not just being coy, we haven't done that yet.

"I also think, if I'm being perfectly honest with you, we've always felt like for the last year and a half that we're always three months away from kind of understanding what the new structure is going to look like.

"So before we kind of react, what is LIV going to be, what's the PGA Tour? We always felt like we were just about to know that answer, so let's figure that out.

"Now, I think the reason we're being more vocal about looking at that [pathway] for next year is maybe this is the new world order, and if that's the case we wanted to take a look at that.

"I think it's feasible. I don't think it's a huge pathway, but we do offer other pathways through DP World Tour or Korn Ferry Tour, so we know that there's an option to get there."

Past U.S. Open champions Brooks Koepka, Dustin Johnson, Bryson DeChambeau and Martin Kaymer are among the LIV golfers to feature at this week's major.

LIV rookies Dean Burmester, David Puig and Eugenio Chacarra all made the field through final qualifying, while veteran Sergio Garcia was added to the list of players on Monday.

Graeme McDowell and Martin Kaymer have been appointed as vice-captains by Team Europe skipper Padraig Harrington for the Ryder Cup.

Both players bring a wealth experience to Harrington's backroom team for the rescheduled clash against the United States, which will take place at Whistling Straits in September – 12 months on from the original date that was scuppered by the coronavirus pandemic.

McDowell was also part of the set-up at Le Golf National in 2018, where Europe – led by Thomas Bjorn – hammered their American counterparts 17.5-10.5.

The Northern Irishman has featured four times as a player (2008, 2010, 2012, 2014), accumulating nine points from 15 matches – including claiming the winning point at Celtic Manor in 2010.

"I decided on Graeme as a vice-captain a long time ago. He was vice-captain in 2018 with me and I liked what he brought to the team room," Harrington said of the 2010 U.S. Open champion.

"He's quite an authority, confident in what he's doing and saying and knows the scene. The only reason he would not have been a vice-captain was if he was going to be a player.

"Graeme is a strong influence and the players look up to him. When he speaks, people listen, but he doesn't speak unless he's got something to say. I definitely saw that when he was vice-captain previously – players pay attention and follow him."

Kaymer too brings plenty of Ryder Cup experience to the table. The German has won 6.5 points from four appearances at the biennial tournament (2010, 2012, 2014 and 2016).

Undoubtedly his most famous contribution came when he sank the winning putt in 2012 to complete the "Miracle of Medinah", where Europe overturned a 10-6 deficit on the final day to retain the trophy.

Whistling Straits is also the scene of Kaymer's 2010 US PGA Championship triumph, which led to his debut in the Ryder Cup. 

"Martin is somebody I wanted as a vice-captain because he has a great personality and brings a calmness, a European element, and a lot of confidence with him," Harrington said of Kaymer, who also won the 2014 U.S. Open. 

"The fact that he won around Whistling Straits also brings that level of authority and assurance that you need.

"Martin will also bring a nice emotion to the team, which is very important. He's somebody who will help with the atmosphere, put an arm around a player or two and bring that level of authority and belief that we may need during the week."