by Garry Paskwietz
It will be two teams going in opposite directions on Saturday when the USC Trojans face the Arizona Wildcats.
The Trojans have won two games in a row under interim coach Clay Helton and are feeling confident in an offense that is leaning more on the run game in recent weeks. Arizona has lost two in a row, including a 49-3 blowout last week at Washington which was only the second time the Wildcats had been held without a touchdown under Rich Rodriguez.
Here are storylines to watch when each team has the ball: