2018 Pac-12 Conference Leaders Fumbles Lost - Games vs. Non-Conference Teams Only through 01/07/2019
| Name | G | Fumbles | Fumbles Lost | Fumble Lost % | |
|---|---|---|---|---|---|
| 1 | Washington State | 4 | 2 | 2 | 100.00 |
| 2 | Arizona State | 4 | 3 | 0 | 0.00 |
| 2 | Stanford | 4 | 3 | 0 | 0.00 |
| 2 | Arizona | 3 | 3 | 1 | 33.33 |
| 2 | Washington | 4 | 3 | 2 | 66.67 |
| 6 | UCLA | 3 | 4 | 2 | 50.00 |
| 7 | Oregon | 4 | 5 | 1 | 20.00 |
| 7 | USC | 3 | 5 | 2 | 40.00 |
| 7 | California | 4 | 5 | 3 | 60.00 |
| 10 | Colorado | 3 | 7 | 1 | 14.29 |
| 11 | Oregon State | 3 | 8 | 4 | 50.00 |
| 12 | Utah | 4 | 11 | 10 | 90.91 |