2018 Pac-12 Conference Leaders Fumbles Lost - Games in August/September Only through 01/07/2019
| Name | G | Fumbles | Fumbles Lost | Fumble Lost % | |
|---|---|---|---|---|---|
| 1 | Stanford | 5 | 2 | 0 | 0.00 |
| 2 | Washington State | 5 | 2 | 1 | 50.00 |
| 2 | Arizona State | 5 | 5 | 1 | 20.00 |
| 2 | Colorado | 4 | 8 | 1 | 12.50 |
| 5 | Washington | 5 | 3 | 2 | 66.67 |
| 5 | UCLA | 4 | 5 | 2 | 40.00 |
| 5 | Arizona | 5 | 6 | 2 | 33.33 |
| 8 | California | 4 | 8 | 4 | 50.00 |
| 8 | Oregon | 5 | 8 | 4 | 50.00 |
| 8 | USC | 5 | 11 | 4 | 36.36 |
| 11 | Oregon State | 5 | 13 | 5 | 38.46 |
| 12 | Utah | 4 | 8 | 7 | 87.50 |