Week 15
2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2021 | 2022 | 2023 | 2024 | 2025
All | ACC | Big 10 | Big 12 | Big East | Conference USA | Division I-A Independents | Mid-American Conference | MWC | Pac-12 | SEC | Sun Belt Conference | WAC
| Place | Team | Rating | Strength of Schedule | +/- | 
|---|---|---|---|---|
| 1. Penn State (11 - 2) Schedule: 5.557 (6) | 8.28 8.28  | |||
| 2. Ohio State (10 - 3) Schedule: 5.801 (1) | 7.527 7.527  | |||
| 3. Iowa (9 - 4) Schedule: 5.427 (8) | 7.241 7.241  | |||
| 4. Michigan St (9 - 4) Schedule: 5.723 (2) | 6.592 6.592  | |||
| 5. Northwestern (9 - 4) Schedule: 5.278 (10) | 6.153 6.153  | |||
| 6. Wisconsin (7 - 6) Schedule: 5.609 (5) | 5.693 5.693  | |||
| 7. Illinois (5 - 7) Schedule: 5.511 (7) | 5.475 5.475  | |||
| 8. Minnesota (7 - 6) Schedule: 5.211 (11) | 5.255 5.255  | |||
| 9. Purdue (4 - 8) Schedule: 5.692 (4) | 4.808 4.808  | |||
| 10. Michigan (3 - 9) Schedule: 5.714 (3) | 4.477 4.477  | |||
| 11. Indiana (3 - 9) Schedule: 5.335 (9) | 3.52 3.52  |