Brock Motum scored 31 points and Royce Woolridge added 25 as Washington State closed out the regular season by crushing USC 76-51 on Saturday.
Scott Suggs hit a tiebreaking 3-pointer with 4 minutes remaining and finished with 23 points, and Washington beat rival Washington State 72-68 on Sunday, handing the Cougars their ninth straight loss.
The raucous student section at No. 2 Gonzaga's arena had no doubt where the Zags should be ranked when The Associated Press' Top 25 comes out on Monday.
Chiney Ogwumike had 28 points and 13 rebounds in the Cardinal's 72-50 rout of Washington State on Saturday that clinched a share of the Pac-12 title for the 13th straight season.
Kevin Pangos scored 18 points and No. 3 Gonzaga beat San Diego 81-50 on Saturday, putting the Bulldogs in position to rise to second in the AP poll after No. 2 Miami was upset by Wake Forest earlier in the day.
Washington State's losing streak reached eight games with a 73-56 road loss to No. 12 Arizona.
Kelly Olynyk had 26 points and nine rebounds, and Elias Harris added 17 points and 13 rebounds to carry No. 5 Gonzaga past pesky San Francisco 71-61 on Saturday, snapping a three-game losing streak on The Hilltop.
E.J. Singler made two free throws with 3.8 seconds left, lifting No. 23 Oregon to a 79-77 overtime win over slumping Washington State on Saturday to hold on to first place in the Pac-12 Conference.
Shabazz Muhammad scored 12 of his 17 points in the first half, when UCLA took control on its way to routing Washington State 76-62 on Saturday night for the Bruins' second straight victory overall and seventh in a row over the Cougars
Jasmine Dixon, Alyssia Brewer and Mariah Williams scored 14 points each and No. 17 UCLA won its sixth in a row, defeating Washington State 80-65 on Sunday.
Solomon Hill scored 18 points in the first half as Arizona beat Washington State 79-65 on Saturday, the Wildcats' fifth consecutive win over the Cougars. Hill made six of eight 3-pointers in the first half as Arizona built a lead it never lost.
Washington State has dismissed wide receiver Drew Loftus from the football team after his arrest for allegedly trying to steal a couple of bottles of alcohol from a grocery store.
Lia Galdeira scored 22 points and Washington State rallied to defeat Oregon State 76-73 in overtime on Sunday.
ike Ladd had a career-high 23 points and Washington State held off Oregon State down the stretch Saturday afternoon for a 71-68 win.