2018 Pac-12 Conference Leaders Fumbles Lost - Games vs. Unranked Teams Only (AP Poll) through 01/07/2019
| Name | G | Fumbles | Fumbles Lost | Fumble Lost % | |
|---|---|---|---|---|---|
| 1 | Stanford | 10 | 7 | 3 | 42.86 |
| 2 | Washington | 12 | 8 | 3 | 37.50 |
| 3 | Washington State | 12 | 9 | 4 | 44.44 |
| 4 | UCLA | 8 | 10 | 5 | 50.00 |
| 5 | Oregon State | 9 | 11 | 4 | 36.36 |
| 6 | Arizona State | 11 | 15 | 3 | 20.00 |
| 6 | Arizona | 11 | 15 | 6 | 40.00 |
| 6 | USC | 9 | 15 | 8 | 53.33 |
| 9 | Utah | 10 | 16 | 8 | 50.00 |
| 10 | Colorado | 10 | 19 | 5 | 26.32 |
| 10 | Oregon | 11 | 19 | 9 | 47.37 |
| 10 | California | 11 | 19 | 11 | 57.89 |