Lessons learned after Week 10 in the Big Ten:
1. The West Division chase could be special: Four teams in the West -- Nebraska, Wisconsin, Iowa and Minnesota -- are in a virtual first-place tie with just one loss. What makes that really fun is they will all play each other in the season's final four weeks, beginning with Iowa-Minnesota in Week 11. We weren't sure the Hawkeyes were a serious contender until Saturday, when Kirk Ferentz's team turned in by far its best performance of the season in a 48-7 blowout of Northwestern. Iowa controlled both lines of scrimmage, Jake Rudock made all the right plays at quarterback and Mark Weisman bowled his way to three touchdowns. With Nebraska and Wisconsin still having to go to Iowa City, the Hawkeyes remain a major threat to win the division if they can repeat their level of play in Week 10. But it's still a wide-open race that should be a lot of fun to watch.
2. Wisconsin's defense gives it a chance: Badgers defensive coordinator Dave Aranda is a hot coaching commodity and showed why again on Saturday. Wisconsin beat Rutgers 37-0 and registered its first conference road shutout since 1998. That came one week after the defense nearly shut out Maryland. Aranda has put together a dominant unit, despite losing nine defensive starters from the past year's team. The return of nose tackle Warren Herring, who was injured in the opener against LSU, has helped take the defense to another level. The Badgers still struggle to throw the ball, but with Melvin Gordon running wild and Aranda's side of the ball shutting things down, Wisconsin has a chance to finish strong.
3. Nebraska can win without Abdullah -- for now: Ameer Abdullah has been so great this season, it's almost easy to take it for granted. But Nebraska got an unwanted reminder of just how important he is to the entire team when he left the Purdue game early with a left knee injury. Abdullah only contributed one yard before he exited, which left the offense in the hands of quarterback Tommy Armstrong Jr. and backup running backs Imani Cross and Terrell Newby. That offense, predictably, wasn't nearly as explosive without its star. The Cornhuskers produced just 299 total yards, but the defense played well in a sloppy 35-14 victory. Abdullah has a mild MCL sprain and could return after next week's bye, for when Nebraska heads to Wisconsin on Nov. 15. The Huskers won't want to try to win that one without him.
4. Hackenberg hanging on by a thread: Penn State sophomore quarterback Christian Hackenberg is a special talent and the reigning Big Ten freshman of the year, but he's having a nightmare sophomore season. He has taken a ton of hits this season and endured five more sacks in Saturday's 20-19 loss to Maryland. His frustration appears to be boiling over, as Hackenberg was seen yelling and waving his arms at his offensive coordinator, John Donovan, on the sideline. The Nittany Lions' offensive line just can't protect him, and that only got worse with left tackle Donovan Smith out with an injury. Hackenberg isn't making great in-game decisions, either, which is likely a byproduct of all the pressure he's been under. James Franklin and his staff don't have a lot of options, but they've got to find a way to make sure they don't lose Hackenberg -- either to injury or mentally.
5. Battle for bowls heating up: Three Big Ten teams -- Iowa, Maryland and Wisconsin -- clinched postseason eligibility Saturday. That makes seven overall for the league. But where it gets interesting is beyond that group. Technically, the other seven teams are all still alive for a bowl bid, though it's hard to envision Indiana getting off the mat to win three more games or Purdue winning out. Rutgers has been stuck on five wins for a few weeks and finally gets a schedule break in hosting Indiana next time out. Illinois and Penn State both have four wins. Can Michigan, which finally showed a little life Saturday (albeit against those same struggling Hoosiers) find two more wins? Can 3-5 Northwestern rebound after a horrific showing at Iowa? There could be a lot of teams fighting for their bowl lives in the final couple weeks.