2018 Pac-12 Conference Leaders Opponent Penalties - Games vs. Non-Conference Teams Only through 01/07/2019
| Name | G | Pen. | Yards | Pen./G | Yards/G | |
|---|---|---|---|---|---|---|
| 1 | Arizona | 3 | 24 | 242 | 8.0 | 80.7 |
| 2 | Washington State | 4 | 38 | 280 | 9.5 | 70.0 |
| 3 | Stanford | 4 | 28 | 276 | 7.0 | 69.0 |
| 4 | California | 4 | 26 | 246 | 6.5 | 61.5 |
| 5 | Oregon State | 3 | 20 | 180 | 6.7 | 60.0 |
| 6 | Colorado | 3 | 22 | 165 | 7.3 | 55.0 |
| 7 | Arizona State | 4 | 26 | 216 | 6.5 | 54.0 |
| 8 | Washington | 4 | 29 | 214 | 7.3 | 53.5 |
| 9 | UCLA | 3 | 21 | 138 | 7.0 | 46.0 |
| 10 | Oregon | 4 | 21 | 165 | 5.3 | 41.3 |
| 11 | USC | 3 | 14 | 119 | 4.7 | 39.7 |
| 12 | Utah | 4 | 15 | 135 | 3.8 | 33.8 |