2018 Big Ten Conference Leaders Turnover Margin - Games in October Only through 01/07/2019
| Name | G | Fum. Gain | Int. Gain | Total Gain | Fum. Lost | Int. Lost | Total Lost | Margin | Margin/G | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Purdue | 3 | 1 | 2 | 3 | 0 | 4 | 4 | -1 | -0.33 |
| 1 | Rutgers | 3 | 2 | 0 | 2 | 0 | 8 | 8 | -6 | -2.00 |
| 3 | Iowa | 4 | 2 | 8 | 10 | 1 | 5 | 6 | 4 | 1.00 |
| 3 | Ohio State | 3 | 3 | 2 | 5 | 1 | 3 | 4 | 1 | 0.33 |
| 3 | Northwestern | 4 | 4 | 3 | 7 | 1 | 7 | 8 | -1 | -0.25 |
| 6 | Michigan State | 4 | 3 | 5 | 8 | 2 | 2 | 4 | 4 | 1.00 |
| 6 | Maryland | 4 | 0 | 8 | 8 | 2 | 2 | 4 | 4 | 1.00 |
| 6 | Michigan | 3 | 1 | 3 | 4 | 2 | 1 | 3 | 1 | 0.33 |
| 6 | Illinois | 4 | 0 | 6 | 6 | 2 | 5 | 7 | -1 | -0.25 |
| 10 | Penn State | 3 | 2 | 4 | 6 | 3 | 2 | 5 | 1 | 0.33 |
| 10 | Nebraska | 4 | 2 | 5 | 7 | 3 | 4 | 7 | 0 | 0.00 |
| 12 | Wisconsin | 4 | 3 | 6 | 9 | 4 | 4 | 8 | 1 | 0.25 |
| 12 | Minnesota | 4 | 3 | 3 | 6 | 4 | 8 | 12 | -6 | -1.50 |
| 14 | Indiana | 4 | 5 | 5 | 10 | 5 | 5 | 10 | 0 | 0.00 |