Mike Sorensen looks at how the Pac-12 stacks up going into Week 6.

1. Stanford (5-0, 3-0)

Last week: Defeated Colorado 48-7

This week: At Washington State 5:30 MT, Versus

Note: The Cardinal just keep on rolling behind Heisman Trophy frontrunner Andrew Luck and an underrated defense.

2. Oregon (4-1, 2-0)

Last week: Defeated Cal 43-15

This week: Home vs. Arizona State, 8:15 p.m. MT, ESPN

Note: The Ducks will have a tough test this week in what could be a preview of the first-ever Pac-12 championship.

3. Arizona State (5-1, 3-0)

Last week: Defeated Utah 35-14

This week: At Oregon, 8:15 MT, ESPN

Note: The Sun Devils have the inside track for the Pac-12 South title after knocking off Utah last week in Salt Lake.

4. USC (4-1, 2-1)

Last week: Bye

This week: At California, 7 p.m. MT, ESPN

Note: QB Matt Barkley will try to keep it going after a week off against a Cal team that is winless in Pac-12 play.

5. Washington (4-1, 2-0)

Last week: Bye

This week: Home vs. Colorado, 1:30 p.m. MT, ROOT, FCS-Atlantic

Note: The Huskies should be well-rested after taking the week off as they face a reeling Colorado team.

6. Cal (3-2, 0-2)

Last week: Lost to Oregon 43-15

This week: Home vs. USC, 7 p.m. MT, ESPN

Note: The Bears played Oregon tough for a half before getting outscored 29-0 in the second half.

7. UCLA (3-3, 2-1)

Last week: Defeated Washington State 28-25

This week: Bye

Note: Coach Rick Neuheisel saved his job for at least another week with a come-from- behind win at home.

8. Washington State (3-2, 1-1)

Last week: Lost to UCLA 28-25

This week: Home vs. Stanford, 5:30 p.m., MT, Versus

Note: Despite the loss at UCLA, the Cougars still have hopes to get to a bowl game, although a win this week will be tough.

9. Utah (2-3, 0-3)

Last week: Lost to Arizona State 35-14

This week: At Pittsburgh, 10 a.m., MT, ESPNU

Note: With their title hopes already down the drain, the Utes are trying to salvage a .500 season and get their ninth straight bowl bid.

10. Oregon State (1-4, 1-2)

Last week: Defeated Arizona 37-27

This week: Home vs. BYU, 2 p.m. MT, FCS-Pacific

Note: The Beavers finally got in the win column last week and face an unpredictable BYU team this week at home.

11. Arizona (1-5, 0-4)

Last week: Lost to Oregon State 37-27

This week: Bye

Note: A loss to a winless Oregon State was the last straw for Arizona officials, who made a rare mid-season firing of coach Mike Stoops.

12. Colorado (1-5, 0-2)

Last week: Lost to Stanford 48-7

This week: At Washington, 1:30 p.m. MT, ROOT, FCS-Atlantic

Note: With Oregon, Arizona State and USC up after this week, the Buffs aren't likely to win until at least November.