2018 Big Ten 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 | Wisconsin | 4 | 100 | 58 | 58.0 | 691 | 6.9 | 5 | 4 | 124.54 | 25.0 | 172.8 |
| 2 | Iowa | 4 | 117 | 72 | 61.5 | 706 | 6.0 | 6 | 2 | 125.73 | 29.3 | 176.5 |
| 3 | Northwestern | 4 | 122 | 80 | 65.6 | 947 | 7.8 | 6 | 3 | 142.08 | 30.5 | 236.8 |
| 4 | Maryland | 4 | 126 | 68 | 54.0 | 839 | 6.7 | 7 | 6 | 118.72 | 31.5 | 209.8 |
| 5 | Minnesota | 4 | 129 | 74 | 57.4 | 670 | 5.2 | 4 | 4 | 105.02 | 32.3 | 167.5 |
| 6 | Ohio State | 5 | 142 | 75 | 52.8 | 1011 | 7.1 | 5 | 4 | 118.62 | 28.4 | 202.2 |
| 7 | Michigan | 5 | 143 | 76 | 53.1 | 731 | 5.1 | 4 | 4 | 99.73 | 28.6 | 146.2 |
| 7 | Indiana | 5 | 143 | 77 | 53.8 | 818 | 5.7 | 6 | 5 | 108.76 | 28.6 | 163.6 |
| 7 | Illinois | 4 | 143 | 90 | 62.9 | 1180 | 8.3 | 9 | 7 | 143.24 | 35.8 | 295.0 |
| 10 | Nebraska | 4 | 144 | 90 | 62.5 | 995 | 6.9 | 6 | 2 | 131.51 | 36.0 | 248.8 |
| 11 | Rutgers | 5 | 150 | 95 | 63.3 | 1144 | 7.6 | 10 | 4 | 144.07 | 30.0 | 228.8 |
| 12 | Penn State | 5 | 167 | 96 | 57.5 | 963 | 5.8 | 8 | 5 | 115.74 | 33.4 | 192.6 |
| 13 | Michigan State | 4 | 173 | 111 | 64.2 | 1153 | 6.7 | 5 | 7 | 121.60 | 43.3 | 288.3 |
| 14 | Purdue | 5 | 185 | 111 | 60.0 | 1424 | 7.7 | 7 | 7 | 129.57 | 37.0 | 284.8 |