BOULDER, Colo. The Oregon Ducks were far from perfect, especially in the early going, but they still had enough to pick apart Colorado 57-16 in a Pac-12 game Saturday afternoon.
The Buffaloes led 3-0 and 10-8 in the first quarter, before the UO onslaught began.
The Ducks outscored Colorado 49-6 from late in the opening period through the middle of the third quarter, as Oregon built a 57-16 lead.
The No. 2-ranked Ducks, who got 355 yards passing (16 of 27) and five TD throws from Marcus Mariota, improved to 5-0 overall and 2-0 in the Pac-12.
Colorado fell to 2-2, 0-2 before the announced crowd of 45,944 at Folsom Field.
Mariota also ran for touchdowns of 1 and 2 yards. He carried seven times for 43 yards.
Byron Marshall got the bulk of the work for Oregon as a ball carrier, with versatile star De'Anthony Thomas sidelined with a leg injury. Marshall ran 23 times for 122 yards.
Freshman Thomas Tyner from Aloha chipped in with 10 carries for 30 yards. His touchdown from 2 yards put the Ducks ahead for good at 15-10.
Wideouts Bralon Addison and Josh Huff also were significant contributors. Addison grabbed five passes for 158 yards and two TDs, and Huff had five catches for 103 yards and two scores.
Keanon Lowe, from Jesuit High, scored on his only catch, a 17-yard toss from Mariota in the final minute of the first quarter. It gave Oregon a 29-10 lead.
The Ducks will go on the road next Saturday for perhaps their first or at least most severe test of the season a 1 p.m. game at Washington (Fox Sports 1).
Colorado came out gambling and using its play book. The Buffaloes began the game with an onsid kick (which didn't work) and scored on a 75-yard bomb from one receiver, Paul Richardson, to another, D.D. Goodson. That play gave the Buffs a 10-8 lead with 9:35 left in the first quarter.
Oregon quickly gained some control of the flow, although the Ducks would wind up allowing 373 yards in Colorado offense, including 280 through the air.
Neither team scored in the final 1 1/2 quarters. Reserve running back Ayele Forde's gainers put the Ducks on the Colorado 1 in the final minute, but Oregon elected to take a knee and run out the clock.
Early in the fourth period, the Ducks drove from their 24 to the Colorado 4-yard line, but third-string QB Jake Rodrigues ended a scramble with a low-percentage pass that the Buffs picked off in the end zone.