The debate is over, at least for now. Ohio State affirmed itself as the Big Ten's top team by putting on an offensive show against Cal, despite missing its top quarterback and top running back.

There's more doubt about whether Michigan or Northwestern is No. 2 after the Wolverines' surprising struggles Saturday against Akron. For now, we have Michigan ahead by a nose hair, thanks to its win against Notre Dame.

Wisconsin might have moved up to the No. 2 line if the officials had given the Badgers a chance to win the game against Arizona State. We like most of what we saw from Gary Andersen's crew on Saturday night. The same can't be said for Nebraska, which takes a tumble after folding the tent against UCLA, and Penn State, which caved defensively against UCF.

Week 3 was mostly rough for the Big Ten, but it had some bright spots. Michigan State found a quarterback, Indiana regained its footing on defense, and Iowa impressed on the ground against Iowa State.

There's not much separation in the league's bottom half, but as we noted Sunday, the Big Ten might not have a truly bad team.

Here's one last look at last week's rankings.

Now, let's get to the rundown ...

1. Ohio State (3-0, last week: 1): It'll take more than injuries and suspensions to slow down the Buckeyes' potent offense. Quarterback Braxton Miller didn't suit up against Cal, but backup Kenny Guiton once again stepped up with 276 pass yards and four touchdowns, to go along with 92 rush yards. Running back Jordan Hall (168 rush yards, 3 TDs) continued his brilliance filling in for the injured Carlos Hyde, who returns this week against Florida A&M.

2. Michigan (3-0, last week: 2): A week after looking like arguably the Big Ten's best team, Michigan backslid with a mistake-ridden performance against Akron. Brady Hoke's crew emerged with a win but also plenty of questions on both sides of the ball. As good as Devin Gardner has looked at times, the first-year starting quarterback must take better care of the football. Michigan also must patch up a vulnerable defense before Big Ten play.

3. Northwestern (3-0, last week: 3): Take away a lackluster first quarter against Western Michigan, and the Wildcats looked impressive on their home field. The offense clearly has improved despite the continued absence of star running back Venric Mark, as stand-in Treyvon Green (158 rush yards, 2 TDs) looks more than capable. Northwestern's defense remains too leaky but covers up yards with takeaways. The Wildcats have positioned themselves well for an Oct. 5 showdown with Ohio State.

4. Wisconsin (2-1, last week: 4): What is there left to say about the Arizona State ending? Wisconsin was far from perfect Saturday night, struggling to protect Joel Stave or stop back-shoulder throws from Arizona State's Taylor Kelly. But the Badgers fought hard in all three phases and received another huge boost from sophomore running back Melvin Gordon. They deserved better. It'll be interesting to see how they bounce back in the Big Ten opener against Purdue.

5. Michigan State (3-0, last week: 8): Look, an offense! And a quarterback! The Spartans finally start moving in the right direction in the rankings after a scoring explosion against Youngstown State. Connor Cook solidified himself as the team's starting quarterback with four touchdown passes and no interceptions, as Michigan State scored 35 first-half points. Sure, it's Youngstown State, but Michigan State needed a starting point on offense. It has one before a tough test at Notre Dame.

6. Nebraska (2-1, last week: 4): The collapses are no longer surprising because they seem to happen so often for Bo Pelini's teams. Sure, Nebraska normally keeps it together at home, and Saturday's third quarter was one of the worst in team history. But this is who these Huskers are under Pelini, a fragile team prone to blowout losses in big games. Nebraska falls off the national radar for a while but still could contend in the mediocre Big Ten.

7. Minnesota (3-0, last week: 7): It was a rough Saturday for the Gophers, who lost starting quarterback Philip Nelson to a hamstring injury and head coach Jerry Kill to another seizure. Minnesota also had a slow start against FCS Western Illinois until the offense caught fire in the fourth quarter behind running back David Cobb and backup quarterback Mitch Leidner, who was efficient in relief of Nelson. The Gophers face a test this week as San Jose State comes to town.

8. Penn State (2-1, last week: 6): It'll be a long week for defensive coordinator John Butler and a unit that surrendered 507 yards in the loss to UCF and had no answers for Knights quarterback Blake Bortles. After a final non-league tuneup against Kent State, Penn State opens Big Ten play against four potent offenses: Indiana, Michigan, Ohio State and Illinois. Wide receiver Allen Robinson is a beast, but Penn State needs more balance.

9. Indiana (2-1, last week: 10): The Hoosiers forced a punt against Bowling Green, and they did much, much more in one of their better defensive performances in recent memory. Bowling Green didn't score an offensive touchdown as defensive end Nick Mangieri and the Hoosiers bent but didn't break. Indiana had more than enough offense from quarterback Nate Sudfeld (335 pass yards, 2 TDs) and running backs Tevin Coleman (129 rush yards, 2 TDs) and Stephen Houston (155 rush yards), pulling away for an impressive win.

10. Illinois (2-1, last week: 9): Missed scoring opportunities in the first half doomed Illinois in the final 30 minutes against Washington, which repeatedly gashed a young Illini defense. But Illinois showed plenty of fight, even in the fourth quarter when the outcome seemed decided. Illinois has playmakers on both sides of the ball -- QB Nathan Scheelhaase, RB/WR Josh Ferguson, WR Ryan Lankford, LB Jonathan Brown -- and could surprise some Big Ten teams.

11. Iowa (2-1, last week: 11): There's an argument that Iowa should handle Iowa State rather easily, which is what happened Saturday in Ames. But Iowa hasn't handled the Cyclones nearly as often as they should, which is what made Saturday's performance so important. The Hawkeyes needed to win this one to generate some positive vibes, and thanks to a Mark Weisman-led run game and a solid defense, they got it done.

12. Purdue (1-2, last week: 12): The Boilers remain at the bottom, but we feel a lot better about them after the Notre Dame game. Quarterback Rob Henry and the offense looked more comfortable, and the defense contained the Irish run attack. There were still too many mistakes down the stretch, but coach Darrell Hazell can build on this. The problem is the schedule simply doesn't let up, as Purdue visits Wisconsin this week.