Teams around the nation are speeding into spring mode. For many programs, that means replacing major pieces of some of the best defenses in 2013. Some of those defenses are replacing players who will be high NFL Draft picks, while others are filling the holes of talented collegiate players who made the defenses work.
Out of the nation's best defenses, there are shutdown corners missing, tackling machines graduating, sack monsters no longer on the edge and space-eaters in the middle eyeballing the NFL. Position coaches and defensive coordinators have spent the winter trying to adjust schemes and find ways to plug holes for the absent talent.
The top defenses from 2013 are shuffling the deck, and across the nation, replacing key players is the name of the game.