ARL CEO Geoff Carr says centres Greg Inglis and Josh Morris were named in Australia's Four Nations train-on squad because the ARL had not been notified of their injuries.

Morris and Inglis have both told the media they have booked off-season surgery on shoulder injuries, but on Monday both were named as candidates for Australia's Four Nations squad.

Carr said all 16 NRL teams had been asked to provide details of their injured players last week but, as of Monday, no team had ruled any of their players out, meaning Inglis and Morris were both presumed to be fit for selection.

"At the moment we've received no correspondence from clubs so the advice from the selectors was 'we'll pick whoever we want to pick'," Carr told AAP.

"We asked clubs last week to tell us, but we haven't heard anything from Greg Inglis or Josh Morris or their clubs, so we don't know what they're up to."

With Israel Folau departing for the AFL, and Brisbane's Justin Hodges (Achilles) not having played all season, there is a dearth of top quality centres.

Dally M centre of the year favourite Jamie Lyon and Penrith's Michael Jennings would be front-runners while the experienced Brent Tate and Timana Tahu could also earn recalls.

Clubs will have until September 15th to provide medical reasons why players would not be fit for the end-of-season international tournament.

"If there's medical evidence supplied by clubs before then and our doctor is satisfied they should be withdrawn, then we'll withdraw them," Carr said.

In better news for Australia, Carr confirmed that injured North Queensland superstar Johnathan Thurston was eager to don the green and gold this year after overcoming his foot complaint.

Thurston will undergo a fitness test on the 15th when the train-on squad meets in Sydney for the first time.

"(Cowboys CEO) Peter Parr called me 10 days ago to say JT is very confident he'll be available," Carr added.

"He's spoken to his surgeon and specialist and he's working towards being available, but he just wanted to make sure we knew he was on track to play."

Meanwhile, Brisbane's young guns have dominated the first announcement of the Prime Minister's XIII train-on squad, with Jharal Yow Yeh, Andrew McCullough and rookie of the year favourite Matt Gillett all gaining selection alongside veteran Corey Parker.

Retiring halfback Brett Kimmorley could pick up the final representative jersey of his career in the exhibition match with Papua New Guinea after he was also named, while wing sensation Akuila Uate was rewarded for a fantastic individual season for Newcastle.

KANGAROOS FOUR NATIONS train-on squad: Darren Lockyer, Sam Thaiday (Broncos), Michael Ennis, Ben Hannant, Jamal Idris, Josh Morris (Bulldogs), Paul Gallen (Sharks), Cooper Cronk, Greg Inglis, Billy Slater, Cameron Smith (Storm), Kurt Gidley (Knights), Matt Scott, Johnathan Thurston, Willie Tonga (Cowboys), Jarryd Hayne, Timana Tahu (Eels), David Taylor (Rabbitohs)

PRIME MINISTER'S XIII train-on squad: Matt Gillett, Andrew McCullough, Corey Parker, Jharal Yow Yeh (Broncos), Brett Kimmorley (Bulldogs), Luke Douglas, Blake Ferguson, Kade Snowden (Sharks), Jarrod Mullen, Akuila Uate (Knights), Tim Mannah, Ben Smith (Eels), Michael Crocker, Ben Lowe, Nathan Merritt (Rabbitohs)

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