Pac-12 roundup: No. 2 Oregon crushes Colorado, 57-16 Marcus Mariota threw five touchdown passes and ran for two scores as No. 2 Oregon routed Colorado, 57-16, on Saturday in Boulder. The Ducks' sophomore connected for two touchdowns each with Josh Huff and Bralon Addison, and played only 21/2 quarters. Oregon (5-0, 2-0 Pac-12) has scored at least 55 points in all of its games under first-year Coach Mark Helfrich, a former offensive coordinator at Colorado. The Buffaloes forced a three-and-out after the opening onside kick, took leads of 3-0 and 10-8, and had Folsom Field in a frenzy when they kept things tight early on. But the crowd didn't like it when Colorado (2-2, 0-2) kept going for field goals while the Ducks were piling up points. The Ducks were leading just 15-10 when they got the ball at their 25 with 2:08 left in the first quarter. Within a minute, they were up 29-10. Mariota dropped back and saw Addison blowing past his man, and he hit him in stride for a 75-yard touchdown. After Terrance Mitchell's interception, Mariota connected with Keanon Lowe from 17 yards out for his second touchdown in 58 seconds, and the rout was on. The Buffaloes reached the Oregon five- and 14-yard lines on their next two drives but first-year Coach Mike MacIntyre went for field goals both times, just as he did when Colorado's first drive stalled at the Ducks' 16. After Will Oliver's pair of chip shots made it 29-16, Oregon twice converted on fourth down on a drive that ended with Mariota scoring to make it 36-16. The Ducks, who came into the weekend as the nation's No. 1 rushing team with a 333-yard average, didn't miss starting running back De'Anthony Thomas, who was sidelined by an ankle injury. Byron Marshall rushed 23 times for 122 yards and freshman Thomas Tyner added 45 yards on 10 carries. The Buffaloes haven't beaten a top-10 team since upsetting third-ranked Oklahoma on Sept. 29, 2007, when Helfrich was Dan Hawkins' offensive coordinator in Boulder. at No. 5 Stanford 31, No. 15 Washington 28: The Cardinal (5-0, 3-0) survived a late scare and held off the Huskies (4-1, 1-1). Washington State 44, at California 22: Connor Halliday threw for 521 yards and three touchdowns in the second-most prolific passing game in school history as the Cougars (4-2, 2-1) ended an eight-game skid against the Bears. Twice in the opening 16 minutes, California was on the verge of scoring a touchdown when a fumble near the goal line ended a promising drive. That put the Bears (1-4, 0-2) in a hole they could never escape. "We are a fragile football team," Coach Sonny Dykes said. When you are a fragile football team and you fumble your first possession of the game after putting a decent drive together, it takes a toll on you. Jared Goff threw for 489 yards and two touchdowns for his third 400-yard passing game already this season, and Chris Harper had 13 catches for 216 yards and a score. But it wasn't enough nearly enough on a day that saw Cal's thin roster get even more depleted. The Bears began the day by announcing that starting center Chris Adcock was out for the year because of a knee injury and safety Alex Logan retired for medical reasons. Then the Bears lost cornerback Stefan McClure (knee) and linebacker Jalen Jefferson (head) in the first half. Cornerback Joel Willis was taken off on a stretcher after the opening kick of the second half. "After a game like this, our confidence is going to be low," Goff said. That's just how it works. Washington State had its highest-scoring conference game since beating Oregon, 55-16, in 2003. "The offensive line played unreal," Halliday said. Those guys really got into a rhythm up front and dominated the game for four quarters. I think I got hit twice. That's a lot of fun back there when you have so much time to get rid of the ball. The game marked a reunion for the coaches. Dykes spent seven years as an assistant under Leach at Texas Tech and credits his mentor for teaching him the nuances of the spread offense he currently uses at Cal.