A new week of Pac-12 men's basketball is set to start tonight, including the Colorado Buffs hosting Washington State.

There were a couple of upsets last week, with Cal knocking off No. 1 Arizona and UCLA falling at Oregon State. Even Washington State beating Washington was a surprise. So, with that, here's my latest edition of the Pac-12 men's basketball power rankings:

1. Arizona (21-1, 8-1; Last week: 1): Despite the loss to Cal - and the loss of Brandon Ashley to a season-ending foot injury - I don't think there's any question the Wildcats are still the best team in the conference.

2. California (15-7, 6-3; Last week: 3): Although the Bears lost three in a row before beating Arizona, knocking off the top team in the country deserves a bump up in the power rankings.

3. Oregon State (13-8, 5-4; Last week: 6): Great weekend at home for the Beavers, as they swept USC and UCLA. They are 4-1 in the last five games.

4. UCLA (17-5, 6-3; Last week: 2): Tough trip to Oregon, as the Bruins barely got past Oregon and then lost to Oregon State.

5. Stanford (14-7, 5-4; Last week: 7): Cardinal nearly beat Cal to the punch, taking Arizona to the wire before falling 60-57. Then, they knocked off Arizona State.

6. Arizona State (16-6, 5-4; Last week 4): Sun Devils were primed for a top-three ranking before tripping up at Stanford.

7. Colorado (16-6, 5-4; Last week: 9): CU rebounded from a bad weekend in Arizona to get an important win against Utah at home.



Oregon (15-6, 3-6; Last week: 11): After their five-game losing streak, the Ducks have gone 2-1 in the past three games with the lone loss coming by two points against UCLA.

9. Utah (14-7, 3-6; Last week: 8): Utes continue to play close games, but they've lost three in a row now because they don't know how to close those games out.

10. Washington State (9-12, 2-7; Last week: 12): Beating rival Washington earns the Cougars a jump in the rankings, and now they've got DaVonte Lacy back.

11. Washington (13-9, 5-4; Last week: 5): Huskies were upset by the Cougars for their fourth consecutive Pac-12 road loss.

12. Southern Cal (10-12, 1-8; Last week: 10): Trojans got swept in Oregon last week and continue to sit at the bottom of the standings.