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Only one of the six games this weekend involving Pac-12 teams will affect a division race, but all of them have some meaning as the regular season concludes.  Friday's games Washington State at Washington, 1:30 p.m. MST, Fox In the Apple Cup, Washington must win to become bowl-eligible and WSU hopes to move up in the Pac-12's bowl selections. The biggest variable is the health of WSU quarterback Luke Falk. The Logan product left last week's win over Colorado with an apparent concussion. Washington found some offense while crushing Oregon State, but the Huskies will face a Cougar defense that has improved throughout the season. The Cougars were stymied by UW's defense in Pullman last year, but they have a lot going for them, particularly if Falk can play. Washington State 31, Washington 24.  Oregon State at Oregon, 2 p.m. MST, Fox Sports 1 For much of this century, Oregon State was one of the Pac-12's most consistently successful programs. Not anymore. Dating to the middle of the 2013 season, the Beavers have lost 20 of 22 conference games. That tailspin will continue in Eugene, where the Ducks have made a remarkable recovery since early October. Oregon 54, Oregon State 14.  Saturday's games Colorado at Utah, 12:30 p.m. MST, Pac-12 Networks Utah is seeking a fourth straight victory over the Buffaloes, with senior quarterback Travis Wilson trying to go 3-0 vs. Colorado in his career after missing the 2013 game due to injury (Adam Schulz quarterbacked the Utes that day). Nobody's using the word "rivalry," but this has been the Pac-12's most competitive November series in this decade with all four games decided by seven points or fewer. This game would be more interesting if Colorado quarterback Sefo Liufau were healthy. His absence should enable Utah to take control early and complete its first nine-win regular season of the Pac-12 era. The Utes can claim a division co-championship, shared with the USC-UCLA winner. Utah 31, Colorado 17.  UCLA at USC, 1:30 p.m. MST, ABC/ESPN2 This game will determine the Pac-12 South's entrant in next week's conference championship game vs. Stanford. The winner will look back and realize that a November loss – vs. Washington State, in UCLA's case, or at Oregon, for USC – ultimately did no harm. The issue is how anyone could make an overwhelming case for either team, in light of those performances. The deciding vote is that regardless of NCAA sanctions, it seems impossible for USC to not win a South title in the Pac-12's five-year history. USC 28, UCLA 27.  Notre Dame at Stanford, 5:30 p.m. MST, Fox If this were the NFL, Stanford would be resting some starters in advance of next week's title game. That won't happen, because of the Cardinal's College Football Playoff possibilities. While there's no guarantee of the winner making the top four, the loser surely is out of the picture. Stanford's loss to Oregon became more forgivable after the Ducks routed USC, and Notre Dame has been unimpressive lately. Stanford 31, Notre Dame 21.  Arizona State at California, 8 p.m. MST, Fox Sports 1 Stanford and Cal like to play the Big Game prior to Thanksgiving, so there will always be one strange-looking matchup in the Pac-12's late-November schedule. In 2011, Cal kept ASU out of the conference championship game with an upset in Tempe. Less is at stake in Berkeley, with each teams merely hoping to become more attractive to bowl selectors. But it should be an entertaining game. Arizona State 35, California 31.  Kurt Kragthorpe