| 1 | R1,2015 | St George Illawarra v Melbourne | 4-12 | L | WG | 1 | | | 4 |
| 2 | R2,2015 | St George Illawarra v Wests Tigers | 4-22 | L | WG | | | | |
| 3 | R3,2015 | St George Illawarra v Canberra | 22-20 | W | WG | | | | |
| 4 | R4,2015 | St George Illawarra v Manly | 12-4 | W | WG | | | | |
| 5 | R5,2015 | St George Illawarra v Newcastle | 13-0 | W | WG | 1 | | | 4 |
| 6 | R6,2015 | St George Illawarra v Canterbury | 31-6 | W | WG | | | | |
| 7 | R7,2015 | St George Illawarra v Brisbane | 12-10 | W | WG | 1 | | | 4 |
| 8 | R10,2015 | St George Illawarra v Canberra | 32-18 | W | WG | | | | |
| 9 | R12,2015 | St George Illawarra v Cronulla | 42-6 | W | WG | 1 | | | 4 |
| 10 | R13,2015 | St George Illawarra v Canterbury | 16-29 | L | WG | | | | |
| 11 | R16,2015 | St George Illawarra v Parramatta | 12-16 | L | WG | 1 | | | 4 |
| 12 | R26,2015 | St George Illawarra v Wests Tigers | 32-30 | W | WG | 1 | | | 4 |
| 13 | FN,2015 | St George Illawarra v Canterbury | 10-11 | L | WG | 1 | | | 4 |