Conference play in the Pac-12 gets fully underway in Week 4 of the 2012 college football schedule. Saturday features five Pac-12 conference games with several intriguing match-ups.

The Arizona Wildcats headline the schedule as they travel to Eugene and face conference-powerhouse Oregon. Both teams are undefeated at 3-0. The Wildcats will be hitting the road for the first time this season, as the Ducks play their fourth-consecutive game in Autzen Stadium. This will be the only Pac-12 game this week pitting two ranked teams against each other, as Arizona is No. 21/22 and the Ducks are No. 3 in the polls.

Arizona State hosts the Utah Utes in a Pac-12 South battle. The Utes are 2-1 after a thrilling victory over rival BYU. The Sun Devils suffered a difficult loss on the road last Saturday, falling to Missouri. Both teams want to get the conference slate started on the right foot, as the division became wide-open when USC fell to Stanford.

Here is the complete Pac-12 schedule for Week 4 (all times Pacific):

Oregon St. at UCLA, 12:30 p.m. (ABC/ESPN2)

Colorado at Washington St., 1 p.m. (FX)

California at USC, 3 p.m. (PAC-12 NETWORKS)

Utah at Arizona St., 7 p.m. (PAC-12 NETWORKS)

Arizona at Oregon, 7:30 p.m. (ESPN)

For a complete college football schedule, visit S.I.'s College football schedule page.

For more on the Wildcats, check out Arizona blog AZ Desert Swarm. For the Sun Devils hit up ASU blog House of Sparky.