2018 Pac-12 Conference Leaders Passing Defense - Games in August/September Only through 01/07/2019
| Name | G | Att | Comp | Pct. | Yards | Yards/Att | TD | Int | Rating | Att/G | Yards/G | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Washington State | 5 | 131 | 65 | 49.6 | 772 | 5.9 | 6 | 5 | 106.60 | 26.2 | 154.4 |
| 2 | Washington | 5 | 156 | 98 | 62.8 | 776 | 5.0 | 1 | 1 | 105.44 | 31.2 | 155.2 |
| 3 | Utah | 4 | 135 | 68 | 50.4 | 724 | 5.4 | 4 | 3 | 100.76 | 33.8 | 181.0 |
| 4 | California | 4 | 121 | 68 | 56.2 | 737 | 6.1 | 5 | 7 | 109.43 | 30.3 | 184.3 |
| 5 | Colorado | 4 | 140 | 71 | 50.7 | 783 | 5.6 | 4 | 3 | 102.83 | 35.0 | 195.8 |
| 6 | Arizona State | 5 | 153 | 87 | 56.9 | 1008 | 6.6 | 6 | 3 | 121.22 | 30.6 | 201.6 |
| 7 | Arizona | 5 | 162 | 98 | 60.5 | 1071 | 6.6 | 8 | 1 | 131.09 | 32.4 | 214.2 |
| 8 | USC | 5 | 174 | 97 | 55.7 | 1090 | 6.3 | 10 | 1 | 126.19 | 34.8 | 218.0 |
| 9 | Oregon | 5 | 153 | 85 | 55.6 | 1191 | 7.8 | 10 | 8 | 132.06 | 30.6 | 238.2 |
| 10 | UCLA | 4 | 121 | 78 | 64.5 | 954 | 7.9 | 5 | 1 | 142.68 | 30.3 | 238.5 |
| 11 | Oregon State | 5 | 161 | 97 | 60.2 | 1201 | 7.5 | 14 | 2 | 149.13 | 32.2 | 240.2 |
| 12 | Stanford | 5 | 173 | 105 | 60.7 | 1213 | 7.0 | 6 | 5 | 125.25 | 34.6 | 242.6 |