It looks like it is still mathematically possible for all 7 teams in the Big Ten West to finish in a tie at 4-5. It requires...
1-5 NW to win all 3 games against Minn, Pur, ILL
2-4 Neb to beat Iowa, Wisc & lose to Mich
3-3 Pur to beat ILL & lose to NW, Ind
3-3 Minn to beat Iowa & lose to NW, Wisc
3-3 Wisc to beat Minn & lose to Iowa, Neb
3-3 Iowa to beat Wisc & lose to Minn, Neb
4-2 ILL to lose all 3 games to Pur, Mich, NW
Edit. NW would still win the tiebreaker in this scenerio ILL & NW would have 4-2 divsion records. Iowa, Pur, Neb 3-3. Minn, Wisc 2-4
Then NW wins the H2H tiebreaker against ILL