USC football Spring Camp notes: Offensive line trending up (3/30)

USC football’s first team offensive line has taken a step forward, according to head coach Clay Helton, as the Trojans completed their ninth day of Spring Camp.

One of the most visible changes to USC football Spring Camp this year has been the presence of a crew of referees at each practice.

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Those officials had a lot to do in the opening weeks of practice, but now finishing up Week 3, the zebras were mostly just there to graze.

Head coach Clay Helton was happy to report that through the last two days of practice, the Trojans were hit with just one penalty flag—a false start on Saturday at Howard Jones Field. That’s 200 snaps of nearly clean…