2018 Pac-12 Conference Leaders Fumbles Lost - Games vs. Ranked Teams Only (AP Poll) through 01/07/2019
| Name | G | Fumbles | Fumbles Lost | Fumble Lost % | |
|---|---|---|---|---|---|
| 1 | California | 2 | 2 | 0 | 0.00 |
| 1 | Arizona State | 2 | 2 | 1 | 50.00 |
| 1 | Oregon | 2 | 2 | 1 | 50.00 |
| 1 | Washington State | 1 | 2 | 1 | 50.00 |
| 5 | Washington | 2 | 3 | 2 | 66.67 |
| 6 | Stanford | 3 | 4 | 1 | 25.00 |
| 6 | Colorado | 2 | 4 | 2 | 50.00 |
| 8 | UCLA | 4 | 5 | 2 | 40.00 |
| 9 | Arizona | 1 | 6 | 3 | 50.00 |
| 9 | Utah | 4 | 6 | 6 | 100.00 |
| 11 | USC | 3 | 9 | 2 | 22.22 |
| 12 | Oregon State | 3 | 12 | 5 | 41.67 |