There are four 3-0 teams in the pac 12.

California has played the 57th toughest schedule and is 3-0.
ASU has played the 77th toughtest schedule and is 3-0.
Utah has played the 138th toughest schedule and is 3-0. 

Cal and ASU have top 20 wins (mich st and wash are still top 20 according to sagarin, even after the loss)