There are seven changes in the starting XV with two in the backs. Harry Robinson return from the Wales squad to start on the wing, while Rob Lewis starts at scrum half in place of Lewis Jones who picked up a knock to his shoulder in last Friday's match.
In the forwards Andries Pretorius return at Number 8 to captain the team and is joined in the back row by Thomas Young who starts at openside.
Macauley Cook starts in the second row while there are two further changes in the front row. Mark Breeze starts at hooker in place of Rhys Williams who moves to the bench and Ryan Harford return from a back injury in place of Foa Filise who also moves to the bench.
Cardiff Blues 15. Dan Fish 14. Harry Robinson 13. Owen Williams 12. Gavin Evans 11.Tom James 10. Gareth Davies 9. Robert Lewis
8. Andries Pretorius 7. Thomas Young 6. Luke Hamilton 5. James Down 4. Macauley Cook 3 Ryan Harford 2 Marc Breeze 1. Sam Hobbs
16. Rhys Williams 17 Campese Mafu'u 18 Foa Filise 19 Cory Hill 20 Rory Watts-Jones 21 Lloyd Williams 22. Ceri Sweeney 23. Rhys Patchell