Brodie Croft and Robbie Rochow have dropped out of the extended squad named on Tuesday.
Ryley Jacks has been named as the current replacement for Cameron Munster at five-eighth while Jahrome Hughes still remains in contention to step in having retained his place on the extended bench.
Craig Bellamy will finalise his squad an hour before kick-off tomorrow night.
Top of the table clash! Storm v Roosters, Saturday 12 August, 5:30pm at AAMI Park!
Melbourne Storm v North Queensland Cowboys
Friday 4 August, 7:50pm
1300SMILES Stadium
1. Billy Slater
2. Suliasi Vunivalu
3. Will Chambers
4. Curtis Scott
5. Josh Addo-Carr
6. Ryley Jacks
7. Cooper Cronk
8. Jesse Bromwich
9. Cameron Smith ©
10. Tim Glasby
11. Felise Kaufusi
12. Joe Stimson
13. Dale Finucane
14. Nelson Asofa Solomona
15. Kenny Bromwich
16. Jordan McLean
17. Slade Griffin
18. Nate Myles
19. Jahrome Hughes