YORK City Knights' two new signings will unsurprisingly go straight into the side that travels to big guns Widnes Vikings on Sunday.

American international Junior Vaivai, who played for South Sydney and Penrith Panthers in the NRL, and young Scotland winger Will Oakes will form a new-look right-side partnership in James Ford's line-up following their high-profile arrival on loan from Hull KR.

The pair will take the number of loanees in the 17 potentially up to five, with Liam Harris, Harry Aldous and Tyler Dupree, who made debuts in last week's Summer Bash defeat to Featherstone, also in the 19.

Elsewhere there are returns for Kriss Brining at interchange hooker, and Sam Scott and Josh Jordan-Roberts in the back row, fit-again Scott playing for the first time since the narrow defeat in Toulouse a month ago.

Key front-rower Graeme Horne is also back in the 19.

Head coach James Ford said of Vaivai and Oakes: "I'm delighted the club is in a position to bring players of that calibre to us.

"It's certainly influenced by the fantastic support we're receiving. The more that continues the stronger the position we will find ourselves in, and that can help us to continue our progress."

Vaivai, 29, has scored three tries in 15 appearances for Rovers this term and Oakes, who scored six tries in 10 appearances for York last year to help them lift the League One title, has featured seven times.

Added Ford: "They've featured a fair bit for Hull KR this season and I'm looking forward to including them for us."

Hull loanee Harris, who played at full-back in last week's loss to Featherstone, is likely to switch roles with Matty Marsh and form a half-back partnership with Connor Robinson.

Explained Ford: "I don't think our combinations were quite right on Saturday. We didn't engage enough defenders.

"Liam and Marshy can play either position and I want to have a look at this combination to see if it's more effective."

Brining is a straight swap for the luckless Harry Carter, who played for the first time since mid-March last week against Featherstone, but needed treatment for a whack to the face on his return from injury.

"Harry took a hefty knock to his head," said Ford. "Kriss Brining needed a rest last week but is available to come back in.

"It's great to have Harry available and he's got a big part to play in our remaining games this season."

On Scott and Jordan-Roberts returning to the back row, he added: "I just thought we missed the kick a little on the edges and it didn't help us break Featherstone down.

"Josh has done everything I've asked him to do in practice and he's got an opportunity based on other individuals not quite hitting the high standards we set them.

"It's always great to have Sam in there. He's a very aggressive bloke and he's hard to handle, and he's got a lot of experience as well.

"On Saturday we had one player over 30 (captain Tim Spears). Although Sam's not over 30, he's vastly experienced and he has a massive influence on the side."

Omitted from the line-up that lost to Featherstone are Carter, winger Kevin Brown, centre Jason Bass and back-rower Brad Hey.

Widnes boss Kieron Purtill has made two changes to the side that lost 36-22 to Leigh last week, with Joe Lyons and the Vikings' top try-scorer this term, the fit-again Ryan Ince, replacing MacGraff Leuluai and Jayden Hatton.

Aussie dangerman Anthony Gelling is out injured but Kiwi star Harrison Hansen and half-back Danny Craven, both sidelined for the reverse fixture at Bootham Crescent in April which York won 17-10, are in the side.

Sam Freeman, who scored four tries in the Vikings' 44-12 Challenge Cup win over a depleted York in April, is also added in the 19.

Widnes (possible): Roby, Ince, Dean, Brand, Buckley, Craven, Gilmore, T Chapelhow, Johnstone, J Chapelhow, Wilde, Walker, Cahill. Subs: from Hansen, Ganson, Farnworth, Lyons, Freeman, Norman.

Knights (probable): Marsh, Oakes, Vaivai, Salter, Whiteley, Harris, Robinson, Teanby, Jubb, Aldous, Scott, Jordan-Roberts, Spears. Subs: from Brining, Horne, Porter, Blagbrough, Stock, Dupree.