Game week is here, and not a moment too soon.

Preseason camps have wrapped up around the Big Ten, and teams are now locking in for their openers this coming weekend. The power rankings will appear each Monday throughout the season, and we're getting things kicked off today.

There aren't many changes from our last version, although some offseason news has affected the rundown. The top five teams certainly have separated themselves in our eyes, while there's not much separating the next five on the list.

Here we go ...

1. Michigan State: We understand why Michigan is the highest-rated Big Ten team in the polls, but Michigan State gets the top spot in our power rankings because of its defense. A top-10 unit in 2011 could easily become a top-five unit this season, as the Spartans are strong at just about every position. While the concerns at quarterback and receiver are warranted, the offense will be effective enough with the run as Le'Veon Bell and a more seasoned line return.

2. Michigan: The Wolverines endured some injuries and off-field issues this summer and in camp, but they still enter the season with justifiably high hopes. Senior quarterback Denard Robinson has matured during his career and could make a serious push for national awards this fall. Michigan must shore up its lines and hope some young players grow up in a hurry. A relentless schedule is the biggest challenge for Brady Hoke's squad.

3. Wisconsin: The offense might not be as electric as it was the past two seasons and the defense has some question marks (secondary, pass rush), but Wisconsin knows how to win and boasts enough to claim another Big Ten title. Montee Ball is extremely motivated after a rough summer, and while Danny O'Brien isn't Russell Wilson, he gives the offense some stability. A favorable schedule with both Michigan State and Ohio State at home helps the Badgers.

4. Ohio State: It's a close call for the No. 4 spot, but the Buckeyes get the edge based on a defense with the potential to be one of the nation's best. John Simon anchors arguably the league's top defensive line, and almost everyone returns in the secondary. While there will be growing pains on offense, the unit can't possibly be worse than last year's, and Braxton Miller has a chance to make significant strides this season.

5. Nebraska: Fifteen starters return to a Huskers team that should be much more comfortable with the Big Ten in Year 2. But questions remain surrounding quarterback Taylor Martinez, replacing star power on defense and getting over the hump on the road. A signature road victory would go a long way for Bo Pelini's program, which returns 15 starters and has a great chance to climb this list and challenge for the Legends division.

6. Purdue: Danny Hope repeatedly called this his best Boilers team during the offseason, and we can see why. Purdue boasts a formidable defensive front and two bona-fide stars on defense in tackle Kawann Short and cornerback Ricardo Allen. The Boilers also return most of their key weapons on offense. What we still need to see is a team that can avoid the major mistakes and mental lapses that have plagued Purdue throughout Hope's tenure. A challenging start to Big Ten play will tell a lot about the Boilers.

7. Penn State: The Lions will ride emotion and a stout defensive front seven this fall, and they could go further than most think after a brutal offseason. Still, it's hard to figure out how Penn State will score points, and the turmoil is bound to catch up with Bill O'Brien's crew at some point. If O'Brien bolsters an offense featuring mostly unproven personnel, Penn State could make a strong push. The schedule is favorable as the Lions get both Ohio State and Wisconsin at Beaver Stadium.

8. Iowa: Youth will be served this fall in Iowa City as the Hawkeyes turn to unproven players at several spots, namely defensive line and running back. The good news is that Iowa boasts a veteran in senior quarterback James Vandenberg, who could thrive under new coordinator Greg Davis. Iowa must ride Vandenberg's right arm and a talented back seven on defense headlined by cornerback Micah Hyde and linebacker James Morris. Iowa also should benefit from its schedule.

9. Illinois: The Illini and Penn State are nearly mirror images, as both teams have first-year coaches, talented defensive front sevens and question marks on offense. Defense could carry Illinois a long way this fall, as end Michael Buchanan and linebacker Jonathan Brown anchor the unit. A new offensive scheme could spark third-year starting quarterback Nathan Scheelhaase, although he'll need unproven weapons to emerge. Illinois could be a sleeper team this fall, although its Big Ten road schedule is flat-out brutal (Wisconsin, Michigan, Ohio State, Northwestern).

10. Northwestern: After a drop in wins the past three seasons, can Northwestern get things turned around? The Wildcats once again should be strong on offense as Kain Colter takes over at quarterback, although there are some questions up front. The defense can't be much worse than it was in 2011, and while there will be more youth throughout the unit, there also should be more talent. Northwestern must capitalize on the first chunk of the schedule, which features several toss-up games but isn't overly taxing.

11. Minnesota: The Gophers will be an improved team in Year 2 under Jerry Kill. The problem is they play in a loaded division and face a tricky schedule with no gimme games. Quarterback MarQueis Gray has a chance to do big things as a senior, although his supporting cast remains a mystery. Troy Stoudermire's return should spark the defense, which played better down the stretch in 2011. Like Northwestern, Minnesota needs to get off to a good start and build confidence.

12. Indiana: The Hoosiers won't go 1-11 again, and they could be dangerous on the offensive side as sophomore quarterback Tre Roberson matures and the passing game becomes a bigger part of the plan. Question marks remain throughout the defense, and Indiana hopes an influx of junior-college players helps the situation immediately. Indiana will be older and better than it was in 2011, and the Hoosiers should be more competitive in Big Ten games. But until they prove otherwise, they're at the bottom.