Technically Northwestern could still win the West. Copied from Reddit:
The scenario:
- Northwestern must win out (@ Minnesota, @ Purdue, vs Illinois)
- Illinois must lose out (vs Purdue, @ Michigan, @ Northwestern)
- Nebraska must defeat Wisconsin and Iowa; and they must lose to Michigan.
- Purdue must lose to Indiana.
- Minnesota/Iowa/Wisconsin must go 1-1 against each other.
This makes everyone tied for first at 4-5. The first tiebreaker is best division record, which would be Illinois and Northwestern at 4-2. Northwestern would then go to the championship due to the head-to-head win over Illinois.