2018 Pac-12 Conference Leaders Opponent Penalties - Games vs. Ranked Teams Only (AP Poll) through 01/07/2019
| Name | G | Pen. | Yards | Pen./G | Yards/G | |
|---|---|---|---|---|---|---|
| 1 | Stanford | 3 | 23 | 241 | 7.7 | 80.3 |
| 2 | USC | 3 | 21 | 202 | 7.0 | 67.3 |
| 3 | Washington | 2 | 13 | 74 | 6.5 | 37.0 |
| 4 | Washington State | 1 | 6 | 47 | 6.0 | 47.0 |
| 5 | California | 2 | 11 | 98 | 5.5 | 49.0 |
| 5 | UCLA | 4 | 22 | 148 | 5.5 | 37.0 |
| 7 | Utah | 4 | 21 | 212 | 5.3 | 53.0 |
| 8 | Oregon | 2 | 10 | 93 | 5.0 | 46.5 |
| 8 | Oregon State | 3 | 15 | 136 | 5.0 | 45.3 |
| 10 | Arizona | 1 | 3 | 35 | 3.0 | 35.0 |
| 10 | Arizona State | 2 | 6 | 50 | 3.0 | 25.0 |
| 12 | Colorado | 2 | 5 | 55 | 2.5 | 27.5 |