Here's a quick look at the nation's best linebackers.
1. Penn State Nittany Lions
Linebacker U is back in business. All three starters -- Paul Posluszny, Tim Shaw and Dan Connor -- return from last year's suffocating group. Posluszny is the headliner who earned first-team AP All-America honors last season after starting every game (12) and registering 116 total tackles, 11 tackles for loss and three sacks.