ESPN has released their B1G Power Rankings after week 4. They moved Wisconsin into the 2nd position ahead of scUM. Also, contrary to popular belief, Purdue somehow isn't last. They actually come in ahead of Illinois, Northwestern, and Rutgers. 

Below are their rankings:

1. Ohio State
2. Wisconsin
3. Michigan
4. Nebraska
5. Michigan State
6. Minnesota
7. Iowa
8. Maryland
9. Penn State
10. Indiana
11. Purdue
12. Northwestern
13. Rutgers
14. Illinois