Final in a series: Mobile sophomore who ended last season No. 2 on the Trojans’ depth chart says he’s ready to make a run for No. 1.

USC opens spring practice on Saturday and plenty of attention will be focused on the quarterbacks, as four main competitors seek to replace Mark Sanchez as the Trojans’ starter. The Times’ Gary Klein had question and answer sessions with each of the contenders as they prepared to vie for the starting spot. Today, he summarizes his interview with Aaron Corp, a former Orange Lutheran High star whose running ability sets him apart from the others.