It's that time again.
Four weeks have passed since the year-end installment of the power rankings, and while no games were played during the span, there has been some news. We know who's coming back (Greg Jones, Evan Royster, Cameron Heyward) and who's not (Thaddeus Gibson, Navorro Bowman, Amari Spievey). We also can size up the recruiting classes for each Big Ten team.
Spring practice in the Big Ten officially kicks off March 13 at Wisconsin, so let's take a look at how the teams stack up heading into the spring. Please remember that the power rankings can -- and will -- change several times before the season begins Sept. 2.
1. Ohio State: The Buckeyes will be a consensus top 5 team and a legit national title contender entering the fall. Heyward's decision to return is huge for a talented defensive front. If quarterback Terrelle Pryor builds off of his Rose Bowl performance and Ohio State solidifies things at left tackle, safety and possibly running back, this team will be scary good.
2. Iowa: The NFL draft stung the Hawkeyes a bit, as both Spievey and left tackle Bryan Bulaga opted to turn pro. But All-America candidate Adrian Clayborn returns, and Iowa will be stacked at both running back and wide receiver in 2010. Rebuilding the offensive line will be Iowa's top priority as it aims for a Big Ten championship this fall.
3. Wisconsin: The mojo is back in Mad-town as Wisconsin returns the core players from a team that went 10-3 and finished 16th in the final AP Poll. Heisman Trophy candidate John Clay leads a balanced and efficient offense, while the defense boasts a lot of young talent but must replace star pass rusher O'Brien Schofield.
4. Penn State: No Big Ten team lost more standout players than the Nittany Lions, but Penn State has shown an ability to reload, particularly in the defensive front seven. Royster's decision to return is huge for Penn State, which will rely on the rushing attack and an improved offensive line in 2010. A crucial quarterback competition begins this spring, as Kevin Newsome tries to hold off several young challengers.
5. Michigan State: I'm a bit leery to put Michigan State this high after 2009, but Jones' decision to return eased some concerns about the defense. The Spartans must get better on both lines and in the secondary, and quarterback Kirk Cousins needs to rebound after a rough finish to his sophomore season. Recruits William Gholston and Max Bullough should help the defense right away.
6. Northwestern: The Wildcats proved in 2009 that they could overcome the losses of several offensive standouts. They'll need to do it again as All-Big Ten quarterback Mike Kafka departs and junior Dan Persa steps in. Northwestern must revive its rushing attack this spring behind an offensive line that returns fully intact. The secondary also is a concern as three starters graduate.
T-7. Michigan: The offense will put up points again, but Michigan's big concerns rest with a defense that loses standouts Brandon Graham and Donovan Warren. A recruiting class headlined by safety Demar Dorsey certainly should help matters, as Michigan needs immediate contributions from its young players. The Wolverines need a strong spring from their early enrollees as they prepare for a critical 2010 season.
T-7. Purdue: It wouldn't surprise me one bit if Purdue finishes in the top half of the Big Ten in 2010, but a few key questions remain. The biggest one comes at quarterback, where Miami transfer Robert Marve and sophomore Caleb TerBush will compete for the top job. Purdue also must reload in the secondary and improve a run defense that has ranked last in the Big Ten in each of the last two seasons.
9. Minnesota: Spring practice will be critical for a Gophers team trying to establish an identity on offense and reload on defense. The starting quarterback job is up for grabs as incumbent Adam Weber tries to hold off MarQueis Gray and impress new coordinator Jeff Horton. Minnesota must replace all three starting linebackers, both starting defensive tackles and both starting cornerbacks.
10. Indiana: The Hoosiers should be very dynamic on offense in 2010, but they must address their chronic defensive woes as soon as possible to rebound this fall. Head coach Bill Lynch is moving several offensive players to defense this spring, and IU's ability to identify impact players likely will determine whether it can rise up the rankings.
11. Illinois: Things have been anything but quiet around Champaign the last eight weeks, as head coach Ron Zook shuffled his coaching staff, bringing in two new coordinators and four new position coaches. Illinois doesn't have time for growing pains, and the new assistants will need to implement the scheme and get the most out of a roster filled with question marks. One way or another, Illinois will be a fascinating team to watch between now and the season opener.