Posted by ESPN.com's Adam Rittenberg
As we continue to preview Big Ten spring football, which begins March 14 at Michigan, it's time to look at five key replacements around the conference.
The Big Ten took the biggest hit at running back with the departures of Shonn Greene, Javon Ringer, Chris "Beanie" Wells, P.J. Hill, Tyrell Sutton and Kory Sheets, among others. There also were key losses on both lines (Mitch King, A.Q. Shipley, Aaron Maybin, Willie VanDeSteeg) and in the secondary (Malcolm Jenkins, Vontae Davis, Otis Wiley), though the quarterback crop returns mostly intact.
The league's lone head-coaching change was pre-planned, as Danny Hope takes over for Joe Tiller at Purdue. But several key assistants depart the league, creating some holes to fill.
Here's a look at five sets of shoes to fill before Sept. 5.
Big shoes: Iowa running back Shonn Greene
The replacement: Sophomore Jewel Hampton
All Greene did last fall was win the Doak Walker Award as the nation's top back, set Iowa's single-season rushing record (1,850 yards) and eclipse 100 yards in all 13 games. As the team switched quarterbacks, identified playmakers at wide receiver and jelled up front, Greene was the constant. Hampton earned high marks as Greene's backup, rushing for 463 yards and seven touchdowns as a true freshman, but he'll take on a much bigger load this fall. The 5-9, 200-pound Hampton lacks Greene's brute strength and size, but he provides a different look for an Iowa offense that will always be based around the run game.
Big shoes: Penn State center A.Q. Shipley
The replacement: Junior Stefen Wisniewski
The defending Big Ten co-champs lose the undisputed leader of the league's best offensive line in Shipley, who won the Rimington Trophy as the nation's top center last year. Wisniewski started at guard in 2008, but he's expected to shift to center and replace Shipley in the heart of the Lions' line. Expectations will be high for Wisniewski, a talented junior whose father and uncle both were star offensive linemen for Penn State.
Big shoes: Michigan State running back Javon Ringer
The replacement(s): Senior A.J. Jimmerson, sophomores Andre Anderson and Ashton Leggett, freshmen Edwin Baker and Larry Caper
No running back in the country had a heavier load than Ringer last fall. He led the nation with 390 carries and tied for the national lead with 22 rushing touchdowns. Michigan State benefited from his tremendous durability, but the coaches didn't develop a reliable backup. The competition to replace Ringer features several young players, including two heralded incoming freshmen. The Spartans could use more of a committee system in 2009, blending speed (Anderson, Caper, Baker, Jimmerson) with size (Leggett). The freshmen should help the situation, but head coach Mark Dantonio wouldn't mind if Anderson, Jimmerson or Leggett emerged in spring ball.
Big shoes: Illinois offensive coordinator Mike Locksley
The replacement: Mike Schultz
Not only was Locksley one of the best recruiters in the country, but he had a strong bond with quarterback Juice Williams, wide receiver Arrelious Benn and other key members of the Illinois offense. Despite a very disappointing 5-7 season, Illinois still led the Big Ten in passing and ranked second in total offense. Schultz comes from a program (TCU) known for defense, but his system produced several standout quarterbacks and running backs. He needs to gain Williams' trust right away and maintain the explosiveness Illinois featured at times last season. There also will be pressure for Schultz to bring in top high school players from Texas and other areas.
Big shoes: Ohio State cornerback Malcolm Jenkins
The replacement: Sophomore Chimdi Chekwa
Some will point to the oft-injured Wells or hyped linebacker James Laurinaitis as Ohio State's biggest losses, but Jenkins was the team's most consistent performer the last two seasons. Shutdown corners don't come around very often, and Jenkins' play-making skills helped him win the Thorpe Award last year. Chekwa beat out Donald Washington for a starting job in 2008 but will take on a greater load this fall as he'll be assigned to mark top opposing wideouts. He had an interception and four pass breakups last year.