DENVER (AP) — The list of Pac-12 teams that remain undefeated has dwindled to a precious three after just two games. Boosting the profile of the conference now falls on the shoulder pads of No. 4 Oregon, No. 13 UCLA and No. 19 Arizona State. The Pac-12 currently has as many unbeaten teams as Conference USA.  In the Power Five conferences, the ACC has five unbeaten teams remaining; the Big 12, six; the Big Ten, seven; and the Southeastern Conference, 10. Those three unblemished Pac-12 teams can’t afford a misstep this week. Not with Pac-12 South favorite Southern California falling out of the rankings after a loss to Stanford, which also led to the firing of coach Clay Helton.

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