Big Ten power poll

1. Ohio State (3-0): The Buckeyes' 15-game winning streak is the longest in the nation.

2. Northwestern (3-0): Safety Ibraheim Campbell has intercepted a pass in five consecutive games.

3. Michigan (3-0): The Wolverines are 17-0 at home under Brady Hoke. Next to visit: Minnesota on Oct. 5.

4. Wisconsin (2-1): Badgers eyeing Sept. 28 showdown against Ohio State, but first comes Purdue.

5. Michigan State (3-0): Connor Cook solidified the quarterback job just in time for team's visit to South Bend.

6. Nebraska (2-1): Taylor Martinez didn't look right, and now we know why: turf toe.

7. Penn State (2-1): Ranks last in the Big Ten in third-down conversion rate — 4-for-34 (11.8 percent).

9. Illinois (2-1): This offense is vastly improved, but the defense let Washington gain 615 yards.

10. Iowa (2-1): The Hawkeyes play 0-3 Western Michigan before visiting Minnesota on Sept. 28.

11. Indiana (2-1): Defense looked better in 42-10 win over Bowling Green, and next comes 2-0 Missouri.

12. Purdue (1-2): Took a 17-10 lead into the fourth quarter of last week's 31-24 loss to Notre Dame.