Arizona's pass rush was already solid last season with 35 sacks, tied for 25th nationally. The Wildcats return key pieces like Russell Davis II, and the staff has shown they can develop talent. USC's desperation for an edge rusher is telling, considering they ranked 102nd in sacks last year. Arizona's defensive scheme under Johnny Nansen creates pressure without needing a single "game-changing" portal add. The focus should be on the secondary anyway, where the real defensive battles in the Big 12 will be won.