Schedule:
| Game | Date | Away Team (Rank) | Away Score | Home Team (Rank) | Home Score | Game Status | Result | Margin |
|---|---|---|---|---|---|---|---|---|
| 1 | 2018-09-01 | Washington State | 41 | Wyoming | 19 | Final | W | 22 |
| 2 | 2018-09-08 | San Jose State | 0 | Washington State | 31 | Final | W | 31 |
| 3 | 2018-09-15 | Eastern Washington | 24 | Washington State | 59 | Final | W | 35 |
| 4 | 2018-09-21 | Washington State | 36 | USC | 39 | Final | L | -3 |
| 5 | 2018-09-29 | Utah (69) | 24 | Washington State (62) | 28 | Final | W | 4 |
| 6 | 2018-10-06 | Washington State (50) | 56 | Oregon State (125) | 37 | Final | W | 19 |
| 7 | 2018-10-20 | Oregon (30) | 20 | Washington State (39) | 34 | Final | W | 14 |
| 8 | 2018-10-27 | Washington State (24) | 41 | Stanford (17) | 38 | Final | W | 3 |
| 9 | 2018-11-03 | California (76) | 13 | Washington State (16) | 19 | Final | W | 6 |
| 10 | 2018-11-10 | Washington State (15) | 31 | Colorado (78) | 7 | Final | W | 24 |
| 11 | 2018-11-17 | Arizona (83) | 28 | Washington State (13) | 69 | Final | W | 41 |
| 12 | 2018-11-23 | Washington (29) | 28 | Washington State (10) | 15 | Final | L | -13 |
| 13 | 2018-12-28 | Iowa State (35) | 26 | Washington State (17) | 28 | Final | W | 2 |