ESPN

We're taking a page from our friends at the ACC blog and starting a series that examines whether certain Big Ten teams will be contenders or pretenders in the 2013 season. The series won't include Ohio State, Michigan or Nebraska, three teams that, in our view, have earned the "contender" label entering the fall. For each team, we'll make a case for why they're contenders and pretenders and provide our final verdict (a final verdict in late April, mind you). We invite you to vote on whether a team is a contender or a pretender or send us your thoughts for mailbags here and here.

First up, the Northwestern Wildcats.

Why they're contenders: Not only did Northwestern win 10 games last season, including its first bowl in 64 years, but the Wildcats return the core pieces from the 2012 squad on both sides of the ball. Fifteen starters return, including the dynamic offensive backfield of quarterback Kain Colter and Venric Mark, an All-Big Ten running back and an All-America all-purpose player. Quarterback Trevor Siemian, who shared time with Colter and improved as the season progressed, also comes back. The key receivers are back and could see enhanced roles in a more balanced offense, and tight end Dan Vitale, a weapon down the stretch last season, is just a true sophomore. Northwestern's speed-based recruiting efforts on defense are starting to pay off, especially in the secondary, where the team returns standouts Ibraheim Campbell and Nick VanHoose and boasts good depth at both cornerback and safety. Defensive end Tyler Scott, the Big Ten's leading returning sacks leader, is back, along with several exciting young edge rushers. Special teams once again should be a strength with Mark and Jeff Budzien, the 2012 Big Ten co-kicker of the year, back in the fold.

Why they're pretenders: It all starts up front, and Northwestern has question marks on both of its lines entering the fall. The Wildcats must replace three starting offensive linemen, including All-Big Ten guard Brian Mulroe. Several potential starters sat out spring practice, and while that gave young players increased reps, the first-team line will have limited time to bond before the season kicks off. Northwestern also is a little thin at defensive tackle after losing Brian Arnfelt. The biggest potential drawback is a schedule that definitely gets tougher and could be significantly more challenging than the 2012 slate. Northwestern faces Ohio State for the first time since 2008, and Wisconsin returns to the slate as well after a two-year break. The Wildcats open Big Ten play with the Buckeyes (home) and the Badgers (road). And while Northwestern has established itself as a solid Big Ten program under Pat Fitzgerald, it hasn't handled high expectations well, like in 2001 (preseason Big Ten favorites) and 2011.

Final verdict: The schedule is definitely a factor, but if Northwestern can split its first two Big Ten contests, it should be right in the mix for the Legends Division title. The Wildcats host the Michigan schools, and although they visit Nebraska, they won in Lincoln with an inferior team in 2011. Some still don't take Northwestern seriously because they can't shed the perception created in the program's dark days. Those days are over, the talent is much better and most of it returns. Northwestern is a contender.

The Big Ten won only two bowl games this season, but several players stood out around the league.

Let's take a look at ESPN.com's Big Ten All-Bowl squad ...

OFFENSE

QB: Devin Gardner, Michigan -- There weren't many good choices around the league, but Gardner fired three touchdown passes and racked up 214 pass yards. He has accounted for at least two touchdowns in all five of his starts at quarterback for the Wolverines.

RB: Le'Veon Bell, Michigan State -- The nation's ultimate workhorse running back did his thing in his final game as a Spartan. Bell had 32 carries for 145 yards and a touchdown, recording his eighth 100-yard rushing performance of the season. He also threw a 29-yard pass on a pivotal third-down play.

RB: Rex Burkhead, Nebraska -- Another back who stood out in his final collegiate game, Burkhead racked up 140 rush yards and a touchdown on 24 carries, and added four receptions for 39 yards. It's really too bad we didn't get to see what Burkhead could have done all season when healthy.

WR: Jeremy Gallon, Michigan -- Gallon recorded career highs in receptions (9) and receiving yards (145), and scored two touchdowns against a strong South Carolina defense in the Outback Bowl. It was his third 100-yard receiving performance of the season.

WR: Derrick Engel, Minnesota -- Along with quarterback Philip Nelson, Engel provided some hope for Minnesota's future on offense with 108 receiving yards on four receptions in the Meineke Car Care Bowl of Texas. His 42-yard reception marked the third longest of Minnesota's season.

TE: Dan Vitale, Northwestern -- The freshman provided offensive balance Northwestern needed against a Mississippi State team that focused on taking away Venric Mark and the run game. Vitale recorded team highs in both receptions (7) and receiving yards (82) as Northwestern ended the nation's longest bowl losing streak in the TaxSlayer.com Gator Bowl.

OL: Taylor Lewan, Michigan -- Everyone remembers Jadeveon Clowney's near decapitation of Michigan's Vincent Smith in the Outback Bowl -- which resulted from a miscommunication between Lewan and tight end Mike Kwiatkowski -- but the Wolverines' left tackle did a good job overall against college football's most dominant defensive lineman. Lewan anchored a line that helped Michigan put up decent numbers against an elite defense.

OL: Zac Epping, Minnesota -- Minnesota's offensive line showed flashes of the dominance it displayed for much of the Glen Mason era against Texas Tech. The Gophers racked up 222 rush yards and two touchdowns on 54 carries, as Epping and his linemates opened up holes for Donnell Kirkwood, Rodrick Williams and MarQueis Gray.

OL: Brian Mulroe, Northwestern -- Mulroe made his 40th career start and helped Northwestern finally get over the hump in a bowl game. The Wildcats had a balanced offensive attack, avoided the penalty flag and didn't allow a sack against Mississippi State.

OL: Cole Pensick, Nebraska -- Stepping in for the injured Justin Jackson at center, Pensick helped the Huskers find success running the ball against Georgia, especially up the middle. Nebraska had 239 rushing yards in the Capital One Bowl.

OL: Travis Frederick, Wisconsin: The Badgers rushed for 218 yards against Stanford, which came into the Rose Bowl with the nation's No. 3 rush defense. They also gave up only one sack to a defense which led the FBS in that category. Frederick played very well at center and announced he would skip his junior year to enter the NFL draft a few days later.

DEFENSE

DL: Quentin Williams, Northwestern -- Williams set the tone for Northwestern's win with an interception returned for a touchdown on the third play from scrimmage. He also recorded two tackles for loss, including a sack, in the victory.

DL: William Gholston, Michigan State -- Another player who stood out in his final collegiate game, Gholston tied for the team lead with nine tackles, including a sack, and had a pass breakup in the Buffalo Wild Wings Bowl win against TCU. The freakishly athletic defensive end stepped up in a bowl game for the second straight season.

DL: Tyler Scott, Northwestern -- Scott and his fellow linemates made life tough for turnover-prone Mississippi State quarterback Tyler Russell in the Gator Bowl. The Wildcats junior defensive end recorded three tackles for loss, including two sacks, and added a quarterback hurry in the win.

DL: Ra'Shede Hageman, Minnesota -- The big man in the center of Minnesota's defensive line stood out against Texas Tech, recording six tackles, including a sack, and a pass breakup. Gophers fans should be fired up to have Hageman back in the fold for the 2013 season.

LB: Max Bullough, Michigan State -- Bullough once again triggered a strong defensive performance by Michigan State, which held TCU to just three points in the final two and a half quarters of the Wings bowl. The junior middle linebacker tied with Gholston for the team tackles lead (9) and assisted on a tackle for loss.

LB: Chris Borland, Wisconsin -- The Badgers' defense clamped down against Stanford after a slow start, and Borland once again stood out with his play at middle linebacker. The standout junior led Wisconsin with nine tackles as the defense kept the Badgers within striking distance in Pasadena.

LB: Jake Ryan, Michigan -- Ryan capped a breakout season with another strong performance in the bowl game, recording 1.5 tackles for loss, a fumble recovery and half a sack. He'll enter 2013 as a top candidate for Big Ten Defensive Player of the Year honors.

CB: Michael Carter, Minnesota -- Carter finished off a strong senior year with two interceptions, a pass breakup and seven tackles in the 34-31 loss to Texas Tech.

CB: Nick VanHoose, Northwestern: The redshirt freshman picked off a Mississippi State pass and returned it 39 yard to set up the game-clinching touchdown in the fourth quarter.

S: Jared Carpenter, Northwestern: The senior was named MVP of the Gator Bowl win with a game-high 10 tackles and a near interception late in the game.

S: Ibraheim Campbell, Northwestern: The Wildcats dominate our all-bowl team secondary for good reason. Campbell had an interception and a pass breakup against the Bulldogs.

Specialists

P: Mike Sadler, Michigan State -- The punters took center stage in Tempe as both offenses struggled, and Sadler provided MSU with a huge lift in the field-position game. He set Spartans bowl records for punts (11) and punting yards (481), averaging 43.7 yards per punt with three inside the 20-yard line. His booming punt inside the TCU 5 helped lead to a game-turning fumble by the Horned Frogs' Skye Dawson.

K: Brendan Gibbons and Matt Wile, Michigan -- Both kickers share the honors after combining to go 3-for-3 on field-goal attempts in the Outback Bowl. Gibbons, the hero of last year's Sugar Bowl, connected from 39 yards and 40 yards in the first half. Wile hit a career-long 52-yard attempt in the third quarter, setting an Outback Bowl record.

Returner: Troy Stoudermire, Minnesota -- It took a bit longer than expected, but Stoudermire finally set the NCAA record for career kick return yards with a 26-yard runback on the opening kickoff against Texas Tech. The senior cornerback finished the game with 111 return yards, including a 37-yard runback, on four attempts.

Northwestern superback Dan Vitale was named the Big Ten Co-Freshman of the Week on Monday.

Vitale, a Wheaton Warrenville South graduate, set career highs of nine catches and 110 receiving yards in the Wildcats’ 23-20 road win over Michigan State on Saturday. He became the second Northwestern receiver to go over 100 yards in a game this season.

The last Northwestern freshman to earn the award was Nick VanHoose on Oct. 15.

Vitale shared the honor with Michigan linebacker James Ross III, who had a career-high 12 tackles in Michigan’s win over Iowa on Saturday.

It took a while, but the Big Ten finally has some separation. You've got the top six teams clearly defined. Then you have the next three and finally the three I's -- Indiana, Iowa and Illinois -- at the bottom.

The top three teams remain intact from Week 12, while Penn State and Northwestern move up a spot and Wisconsin moves down despite a good effort against Ohio State. Overall, there's not much movement. Expect a little more shuffling after the final Saturday of the regular season, but at this point, teams have defined themselves as good, average or disappointing.

To the rundown ...

1. Ohio State (11-0, 7-0 Big Ten; last week: 1): Quarterback Braxton Miller and the offense carried Ohio State through the first half of the season. But defense wins championships, and the silver bullets stepped up Saturday at Wisconsin, as linebacker Ryan Shazier and defensive end John Simon triggered an impressive bend-but-don't-break effort. Urban Meyer's team claimed the Leaders Division title and now sits on the doorstep of history, needing a win against archrival Michigan to record the sixth unbeaten, untied season in team history.

2. Nebraska (9-2, 6-1; last week: 2): There was no second-half drama Saturday against Minnesota, as Nebraska surged to 38-0 lead in less than three quarters. Quarterback Taylor Martinez continued his push for Big Ten Offensive Player of the Year honors, becoming Nebraska's career passing leader with 308 yards. Wide receiver Kenny Bell (9 catches, 136 yards, 2 TDs) had another big day, and an improving defense held Minnesota to 11 first downs and 177 yards. Nebraska is one win away from punching its ticket to Indianapolis for the Big Ten title game.

3. Michigan (8-3, 6-1; last week: 3): Devin Gardner, your table is ready. Gardner showed Saturday that Michigan's future on offense is very bright, racking up 314 pass yards on 18 of 23 attempts with six touchdowns (three passing, three rushing) in a rout of Iowa. He is the first Wolverines player to account for six touchdowns since Steve Smith scored three rushing and three passing touchdowns at Minnesota in 1983. Denard Robinson is back in the fold, but Gardner provides the balance Michigan has lacked on offense. Gardner led Michigan to touchdowns on its first six possessions. The Wolverines' chances in The Game against Ohio State look a lot better than they did a few weeks ago.

4. Penn State (7-4, 5-2; last week: 5): It was a bittersweet day for Penn State, which got back on track with a win against Indiana but lost star linebacker Michael Mauti to another apparent knee injury. Senior quarterback Matt McGloin picked apart the Hoosiers for 395 passing yards and four touchdowns, becoming the school's single-season passing leader, while star wideout Allen Robinson had 10 receptions for 197 yards and three touchdowns. Penn State finishes its season this week against Wisconsin at Beaver Stadium.

5. Northwestern (8-3, 4-3; last week: 6): Pat Fitzgerald's crew took another fourth-quarter lead and this time held on, despite losing star running back Venric Mark to injury and going with Trevor Siemian at quarterback instead of Kain Colter. Although Northwestern benefited from four Michigan State turnovers, it took a more aggressive approach in crunch time and recorded a key road win to likely secure a Gator Bowl berth. Siemian, tight end Dan Vitale and others stepped up for the Wildcats, who finish up this week against Illinois in Evanston.

6. Wisconsin (7-4, 4-3; last week: 4): It's a little harsh to drop Wisconsin two spots after an overtime loss to Ohio State, but the move has more to do with both Penn State and Northwestern winning. The Badgers received a terrific defensive performance in regulation and outplayed Ohio State for long stretches, but they couldn't convert yards into points and repeatedly wasted opportunities in Ohio State territory. Montee Ball rushed for 191 yards and a score, and quarterback Curt Phillips made some key throws, but Wisconsin fell short on its home field for the second consecutive game. The Badgers visit Penn State this week before heading to Indy for the title game.

7. Michigan State (5-6, 2-5; last week: 7): Um, yeah, we didn't see this coming, either. Michigan State, picked by both of us and many others to win the Big Ten, needs to beat Minnesota just to get bowl eligible. The Spartans failed to win a Big Ten home game for the first time since 2006 after sweeping their entire home slate in each of the past two seasons. Mistakes once again doomed MSU, which had the edge in total yards, first downs, third-down conversions and many other categories against Northwestern. Andrew Maxwell passed for 297 yards and two scores, but it wasn't enough.

8. Minnesota (6-5, 2-5, last week: 8): Minnesota might be good enough to get to a bowl game, but the Gophers still can't compete with the Big Ten's elite. Jerry Kill's team was overmatched from the onset against Nebraska and never challenged the Huskers in a 38-14 loss. Freshman quarterback Philip Nelson had a rough afternoon, and one of the nation's best pass defenses couldn't stop Martinez, Bell and the Huskers. Minnesota has been a resilient team and must regroup for its finale at home, which would secure a winning season before the bowl game.

9. Purdue (5-6, 2-5; last week: 9): Credit the Boilers for not giving up after an 0-5 start to Big Ten play. Although the season didn't go as expected, Purdue is just one win away from heading to a bowl for the second straight season. The Boilers held off Illinois to record consecutive Big Ten road wins for the first time since 2009. Purdue had a balanced offensive attack triggered by the Akeems (Shavers and Hunt), and unlike last week, it didn't hurt itself with turnovers. Danny Hope's crew now returns home for the Bucket game and can close the season on a three-game win streak.

10. Indiana (4-7, 2-5; last week: 10): Credit the Hoosiers for fighting a lot harder than they did last week against Wisconsin. Cameron Coffman passed for 454 yards and Kevin Wilson got creative with onside kicks. But it's the same story for Indiana's defense, which simply isn't strong enough to stop good Big Ten offenses. McGloin and Penn State had their way with IU, which won't be going bowling and must make significant strides on the defensive side to get to the postseason in 2013.

11. Iowa (4-7, 2-5; last week: 11): Is it over yet? That's all Hawkeyes fans can ask themselves after the team's latest debacle against Michigan at the Big House. Iowa's once-solid defense has completely fallen apart in recent weeks, allowing touchdown drives on Michigan's first six possessions and 513 yards to the Wolverines. The offense continues to stop and start, and Kirk Ferentz's team is assured of its first losing regular season since 2000. Iowa also is mired in its first five-game losing streak since 2000.

12. Illinois (2-9, 0-7; last week: 12): At least the Illini didn't get blown out. Illinois lost a Big Ten game by fewer than two touchdowns for the first time this season, although that's little consolation for a team that has dropped eight straight and five straight on Senior Day. The Illini continued to beat themselves with three fumbles, including two by wide receiver Ryan Lankford. A talented Illinois defense has played better the past two weeks, but Purdue still racked up 207 rush yards. Coach Tim Beckman has emphasized the Northwestern game since his arrival, and an upset of the Wildcats this week in Evanston would be the only bright spot in an otherwise miserable season.