It's time to jump back into our preseason position group rankings. We've made our way through the offenses and the front line of the defenses. Now it's time to take a look at the linebackers.

As always, this is a ranking of the entire position group, so depth matters in addition to individual star players.

Away we go:

Nebraska's Lavonte David led the Big 12 last season with 152 tackles. AP Photo/Nati Harnik

1. Nebraska: Lavonte David set the school record with 152 tackles last year, best in the Big 12. He also added 15 tackles for loss and six sacks on his way to second-team All-America honors. David was a one-man wrecking crew last year but should get more help this year. Will Compton returns after an injury-shortened season, and Sean Fisher is back after a broken leg cost him all of 2010. With an excellent defensive front leading the way, the Cornhuskers' linebackers should make plenty of impact plays.

2. Penn State: Is this the return of Linebacker U? The Nittany Lions technically only return one starter at the position but have plenty of talent. The unit got hit by injuries last year, including one that knocked Michael Mauti out of the lineup for several games. He's one of the best in the Big Ten when healthy, which he should be in 2011. Senior Nate Stupar led the team in tackles last year. Sophomores Gerald Hodges and Khairi Fortt are among the skilled youngsters battling for playing time. This could wind up as the deepest linebacking corps in the league.

3. Ohio State: The Buckeyes lost two starters, including leading tackler Brian Rolle. But the Silver Bullets usually reload at linebacker. Senior Andrew Sweat should emerge as the unit's leader, and hopes are high for Etienne Sabino after he took a redshirt year in 2010. Sabino showed promise this spring and locked down a starting job. The battle is on for the third starting position. Incoming freshman Curtis Grant could make a sudden impact.

4. Wisconsin: Much depends on the health of Chris Borland, who missed nearly all of 2010 and sat out the spring with a shoulder injury. The 2009 Big Ten Freshman of the Year will move to middle linebacker and should anchor the unit if he's sound. Mike Taylor finished second on the team in tackles for loss and interceptions last year, and Kevin Claxton is expected to take over at the strongside spot. The Badgers like what they have seen from redshirt freshman Marcus Trotter.

5. Iowa: The Hawkeyes lost a lot of experience from the 2010 team, including leading tackler Jeremiha Hunter. While there's some concern about the leadership void, Iowa has good young building blocks here. James Morris was pressed into service as a true freshman and was terrific; another year of development should only make him better. Tyler Nielsen was missed down the stretch when he suffered a neck injury, and the senior provides a veteran presence. Players like Bruce Davis, Christian Kirksey and Anthony Hitchens need to take on bigger roles.

Replacing two-time All-American Greg Jones will be a tall order for the Spartans. Jonathan Daniel/Getty Images

6. Michigan State: It would be difficult to overstate how much the Spartans will miss two-time All-American Greg Jones and Eric Gordon, who combined to start 95 games in their illustrious careers. But life goes on. The lone returning starter, Chris Norman, is a dependable veteran. The Spartans hope Max Bullough and Denicos Allen build on their potential, and TyQuan Hammock inspired confidence with his play this spring.

7. Minnesota: An experienced linebacker group could be the strength of the Gophers defense this season. All three starters -- leading tackler Gary Tinsley, Keanon Cooper and Mike Rallis -- are back. Rallis needs to stay healthy after only appearing in 12 games the past two years because of injuries. Florida transfer Brendan Beal should provide a boost.

8. Purdue: The Boilermakers are led by senior Joe Holland, who has 35 career starts under his belt. Junior Dwayne Beckford finished second on the team with 85 tackles a year ago. Will Lucas could break out after an excellent true freshman campaign. Senior Chris Carlino adds veteran depth.

9. Michigan: The Wolverines struggled defensively last year, and the linebackers shouldered some of the blame. They lost Jonas Mouton to the NFL. Cam Gordon moves down from safety and adds some playmaking ability. Kenny Demens had 82 tackles last year at middle linebacker. Freshman Jake Ryan should contribute right away. This group still has a lot to prove.

10. Illinois: The Illini have to rebuild after losing a pair of NFL draft picks at the position in Martez Wilson and Nate Bussey. Senior Ian Thomas now becomes the veteran leader. Sophomores Johnathan Brown and Houston Bates -- who had a strong spring -- will be counted on to step forward.

11. Indiana: Fifth-year senior Jeff Thomas could be the centerpiece of the Hoosiers defense. Another fifth-year senior is Leon Beckum, though he lacks top-end speed. Overall, there isn't a lot of depth here.

12. Northwestern: Linebacker play was a sore spot last season, and starters Nate Williams and Quentin Davie are gone. Bryce McNaul needs to recover all the way from shoulder surgery and has to stay healthy. Pat Fitzgerald thinks he has some talented young players at the position; they'll need to grow up fast.