St George Illawarra coach Paul McGregor has named a 23-man squad ahead of the Dragons' Round 18 clash against the Wests Tigers at Jubilee Oval, Kogarah on Sunday, July 15.

All five State of Origin representatives have been named to back up from Wednesday's clash, although this has also allowed coach McGregor to name two further players among his squad.

Jason Nightingale has also been named on the wing, with Kurt Mann reverting to the interchange while Luciano Leilua has maintained his place in the 17 following last week's defeat to the Melbourne Storm.

The Dragons will face the Tigers at Jubilee Oval for the first time since 2012, with it also set to be Russell Packer's first game against his former club since departing at the end of last season.

NRL squad for Round 18 v Wests Tigers:

1. Matt Dufty – sponsored by Illawarra Mercury/St George & Sutherland Shire Leader
2. Nene Macdonald – sponsored by Relativity in the Loop
3. Euan Aitken – sponsored by University of Wollongong
4. Tim Lafai – sponsored by Kingsgrove Sports Centre
5. Jason Nightingale– sponsored by SMAI
6. Gareth Widdop (c) – sponsored by Dynamic Projects
7. Ben Hunt– sponsored by Paul's Customs and Forwarding Solutions
8. James Graham – sponsored by EFEX                                                  
9. Cameron McInnes – sponsored by Floormania
10. Paul Vaughan – sponsored by My Muscle Chef
11. Tyson Frizell – sponsored by Val Morgan
12. Tariq Sims – sponsored by Stonemasons & Landscapers (since 1970)
13. Jack de Belin – sponsored by Wollongong Jetski

Interchange:
14. Jeremy Latimore – sponsored by Addbuild Additions
15. Kurt Mann – sponsored by Wollongong Diagnostics
16. Leeson Ah Mau – sponsored by Westfund
17. Luciano Leilua – sponsored by Domus Lighting
18. Patrick Herbert
19. Hame Sele
20. Blake Lawrie
21. Reece Robson
22. Jai Field
23. Darren Nicholls