Defensive efficiency: opponent points per possession (Opp. PPP--more about this stat) Thru January 1 1. Iowa (0.80) 2. Illinois (0.84) 3. Indiana (0.90) 4. Minnesota (0.90) 5. Northwestern (0.91) 6. Michigan (0.93) 7. Ohio State (0.94) 8. Wisconsin (0.95) 9. Penn State (0.96) 10. Purdue (1.01) 11. Michigan State (1.01)