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With Carl Pelini accepting the head coach position at Florida Atlantic, Nebraska finds itself without a defensive coordinator.
There's a variety of things Bo could do to solve this problem. One is to promote from within the program. If that happened, the most likely candidate would be John Papuchis.
Bo could also hire someone from the outside. Many names have been brought up ranging from recently fired Illinois coach Ron Zook to former Arizona coach Mike Stoops.
Bo likes to hire people he's had experience with. It just so happens that Bo has experience with both of those coaches. Zook was on the Ohio State staff when Pelini played there. And then there's Stoops.
Most people know of the relationship with the Pelini and Stoops brothers. They grew up in Youngstown, Ohio and remain friends. Stoops would be a great hire that many Husker fans would be excited about.
Regardless, Bo must decide carefully. One wrong choice and the defense could be in for a down slide, though not likely because Pelini likes to play a role in the defensive schemes.