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Adam Schefter talks about how the Rams will replace defensive coordinator Gregg Williams

Wisconsin defensive coordinator Chris Ash talks about the Badgers defense this spring.

Ohio State co-defensive coordinator Everett Withers talks about working alongside Luke Fickell, and his first spring in Columbus.

Arizona State defensive coordinator Paul Randolph, who spent last season at Pitt under new Sun Devils coach Todd Graham, talks about the Arizona heat, the team's new schemes, and who has played well this spring.

Michigan State defensive coordinator Pat Narduzzi talks about how the Spartans defense looks this spring.

California defensive coordinator Clancy Pendergast talks about the Bears young talent and some positions that have yet to be decided.

Iowa defensive coordinator Phil Parker talks about his first spring in the role and what to expect from the unit in 2012

Michigan defensive coordinator Greg Mattison talks about the Wolverines' defense this spring.

Indiana co-defensive coordinator Doug Mallory talks about how the Hoosiers can improve on defense in 2012.

Stanford defensive coordinator Derek Mason looks back at the 2011 defense and looks forward to what he as coming back in 2012.

Nebraska defensive coordinator John Papuchis talks about his first spring in the role and how the defense looks so far.

Illinois defensive coordinator Tim Banks discusses the progress of the defense through the first half of the spring.

New Arizona defensive coordinator Jeff Casteel talks with Ted Miller about spring practices and his first impressions of his talent.

ESPN's Jill Montgomery interviews Oklahoma Sooners new defensive coordinator Mike Stoops about returning to the Sooners and his thoughts on the 2012 recruiting class.

Jeremy Schaap profiles former Penn State defensive coordinator Jerry Sandusky.

Michigan State's defensive coordinator Pat Narduzzi shows on film the way to stop the power run which is seen all over the Big Ten