| 09/02/05 | at | Utah | 24-27 |
| 09/10/05 | hosting | Northern Arizona | 31-12 |
| 09/17/05 | hosting | Purdue | 24-31 |
| 10/01/05 | at | California | 0-28 |
| 10/08/05 | at | Southern Cal | 21-42 |
| 10/15/05 | hosting | Stanford | 16-20 |
| 10/22/05 | hosting | Oregon | 21-28 |
| 10/29/05 | at | Oregon State | 29-27 |
| 11/05/05 | hosting | UCLA | 52-14 |
| 11/12/05 | hosting | Washington | 14-38 |
| 11/25/05 | at | Arizona State | 20-23 |