The match will be played on Saturday night at Carrara Stadium on the Gold Coast.
Luke Priddis and Jason Wrigley, both carrying minor injuries, have been rested for this match.
The squad, as announced just before training tonight by John Lang, is:
Rhys Wesser, Michael Gordon, Danny Galea, Paul Franze, Trent Clayton, Preston Campbell, Craig Gower, Trent Waterhouse, Tony Puletua, Joe Galuvao, Ben Ross, Shannon Donato, Joel Clinton, Garret Crossman, Frank Puletua, Frank Pritchard, Luke Swain, Ben Rogers, David McLean, Damien Blanch.
Here is the St Marys-Penrith Cougars squad for the trial against the Sydney Roosters on Saturday:
1. Nathan Gilchrist, 2. Geoff Daniela, 3. Adrian Buxton, 4. Scott Russell, 5. Matthew Forwood, 6. Peter Wallace, 7. Jono Rolfe, 8. Matthew Cross, 9. Paul Aiton, 10. Steven O'Beirne, 11. Ben Pomeroy, 12. John Nuumaalii, 13. Matthew Pow, 14. Andrew Pearn, 15. John Flint, 16. Junior Moors, 17. Michael Burke, 18. John Geeves, 19. Ryan Rolfe.
The match will be played at Kirkham Oval, Camden and kick-off is at 4.30pm.