In SB Nation's last mock draft, posted before the Green Bay Packers signed veteran center Jeff Saturday, they had Wisconin center Peter Konz going to the Packers. I've been a fan of the idea of drafting Konz all offseason with Wells' status and the center position up in the air, but that's obviously not a position of need -- or at least a position of so much need that it's worth reaching to fill.
Unless there's a player in another spot who drops considerably that Ted Thompson thinks is far and away the best player available, the Pack is almost certainly going to use their pick on either a 3-4 defensive end or outside linebacker. The one that Ryan Van Bibber has dropping to the Packers for them to pick up at No. 28 is Michigan State's Jerel Worthy.
Green Bay's defensive front desperately needs some strength. Worthy is a good fit for the Packers and should be able to occupy blockers, giving Clay Matthews, Jr. some room to work.
I think that Worthy would probably occupy the right defensive end spot opposite Matthews if he was drafted, but it will be interesting to see if impending draft picks and free agent signings cause players like Clay Matthews and Ryan Pickett to play slightly different roles.