Kyle Williams looks at the keys for USC as it tries to keep up and avoid a third straight loss to Oregon.
After losing a thriller to Stanford, USC hopes to get well at the expense of a 1-8 Colorado team.
USC is looking for its first road win of the season Thursday night against Cal, which has lost its first two Pac-12 games.
Both USC and Arizona are coming in off losses and have the capability of producing, along with giving up, big plays.
There are questions along the USC offensive line as two new guards drop into the mix with veterans Matt Kalil and Khaled Holmes.