For most of the 2010 football season, USC's defense could best be described as "shaky".

The defensive line, a supposed strong suit for the Trojans, was often porous against the run and rarely found themselves in their opponent's backfield, thus offering opposing quarterbacks ample time to exploit USC's young secondary.

Meanwhile, the linebacking unit, a weak spot in 2009, continued to be a non-factor in 2010, as defensive coordinator Monte Kiffin searched for schemes to put pressure on their opponents' offense.

To make matters worse, the Trojans were breaking in three new players in the defensive backfield, which featured a true freshman ...

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