24-hour warning: Round 15 v Cowboys

St George Illawarra coach Paul McGregor has amended his squad to 19 ahead of the Dragons' Round 15 clash against the North Queensland Cowboys at WIN Stadium, Wollongong.

Tim Lafai (syndesmosis) has been ruled out of making an early return; Lachlan Maranta will play in the centres once again.

Jordan Pereira is the other player to be omitted from Tuesday's initial squad.

NRL squad for Round 15 v North Queensland Cowboys –

1. Matt Dufty – sponsored by Dynamic Projects
2. Jonus Pearson – sponsored by SMAI
3. Euan Aitken – sponsored by University of Wollongong
20. Lachlan Maranta – sponsored by Kingsgrove Sports Centre
5. Mikaele Ravalawa – sponsored by Tosich Group
6. Corey Norman – sponsored by Illawarra Mercury/St George & Sutherland Shire Leader
7. Ben Hunt – sponsored by Paul's Customs and Forwarding Solutions
8. Blake Lawrie – sponsored by EFEX
9. Cameron McInnes (c) – sponsored by Floormania
10. Paul Vaughan – sponsored by My Muscle Chef
11. Jacob Host – sponsored by Wollongong Jetski
12. Tariq Sims – sponsored by Stonemasons & Landscapers (since 1970)
13. Tyson Frizell (c) – sponsored by Val Morgan

Interchange: 
14. Jeremy Latimore – sponsored by Dincel Construction System 
15. Reece Robson – sponsored by Professionals Padstow
16. Korbin Sims – sponsored by Stonemasons & Landscapers (since 1970) 
17. Luciano Leilua– sponsored by Domus Lighting
18. Jai Field
21. Josh Kerr