2021 Pac-12 Conference Leaders Passing Defense - Games in August/September Only through 01/10/2022
| Name | G | Att | Comp | Pct. | Yards | Yards/Att | TD | Int | Rating | Att/G | Yards/G | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Arizona | 4 | 88 | 51 | 58.0 | 688 | 7.8 | 8 | 2 | 149.08 | 22.0 | 172.0 |
| 2 | Arizona State | 4 | 95 | 49 | 51.6 | 497 | 5.2 | 3 | 5 | 95.42 | 23.8 | 124.3 |
| 3 | Utah | 4 | 120 | 74 | 61.7 | 654 | 5.5 | 6 | 4 | 117.28 | 30.0 | 163.5 |
| 4 | USC | 4 | 122 | 75 | 61.5 | 935 | 7.7 | 8 | 6 | 137.66 | 30.5 | 233.8 |
| 5 | Stanford | 4 | 125 | 72 | 57.6 | 769 | 6.2 | 5 | 3 | 117.68 | 31.3 | 192.3 |
| 6 | Colorado | 4 | 126 | 74 | 58.7 | 863 | 6.8 | 3 | 1 | 122.53 | 31.5 | 215.8 |
| 7 | Washington | 4 | 129 | 71 | 55.0 | 688 | 5.3 | 2 | 3 | 100.31 | 32.3 | 172.0 |
| 8 | Oregon | 4 | 156 | 96 | 61.5 | 1146 | 7.3 | 5 | 9 | 122.29 | 39.0 | 286.5 |
| 9 | Washington State | 4 | 157 | 95 | 60.5 | 1073 | 6.8 | 7 | 4 | 127.53 | 39.3 | 268.3 |
| 9 | California | 4 | 157 | 87 | 55.4 | 1188 | 7.6 | 9 | 3 | 134.07 | 39.3 | 297.0 |
| 11 | Oregon State | 4 | 165 | 97 | 58.8 | 1118 | 6.8 | 5 | 8 | 116.01 | 41.3 | 279.5 |
| 12 | UCLA | 4 | 185 | 112 | 60.5 | 1321 | 7.1 | 9 | 4 | 132.25 | 46.3 | 330.3 |