2018 Pac-12 Conference Leaders Fumbles Lost - Games vs. Conference Teams Only through 01/07/2019
| Name | G | Fumbles | Fumbles Lost | Fumble Lost % | |
|---|---|---|---|---|---|
| 1 | Washington | 10 | 8 | 3 | 37.50 |
| 1 | Washington State | 9 | 9 | 3 | 33.33 |
| 3 | Stanford | 9 | 8 | 4 | 50.00 |
| 3 | Utah | 10 | 11 | 4 | 36.36 |
| 3 | Arizona State | 9 | 14 | 4 | 28.57 |
| 6 | UCLA | 9 | 11 | 5 | 45.45 |
| 6 | Oregon State | 9 | 15 | 5 | 33.33 |
| 8 | Colorado | 9 | 16 | 6 | 37.50 |
| 9 | California | 9 | 16 | 8 | 50.00 |
| 9 | Arizona | 9 | 18 | 8 | 44.44 |
| 9 | USC | 9 | 19 | 8 | 42.11 |
| 12 | Oregon | 9 | 16 | 9 | 56.25 |