EUGENE, Ore. — Heading into halftime locked at 14-all with UCLA, No. 2 Oregon didn’t panic. The Ducks knew they would eventually wear down the No. 12 Bruins. Because that’s what they do.

“We understand that our tempo is one of our greatest allies,” sophomore quarterback Marcus Mariota said.

Oregon went on to score 28 unanswered points in the second half and beat UCLA 42-14 on Saturday night.

Byron Marshall ran for 133 yards and three touchdowns, Mariota threw for 230 yards and another score, and the Ducks (8-0, 5-0 Pac-12) racked up 555 yards in total offense compared to 283 for UCLA (5-2, 2-2).

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“We just had to keep chipping away,” Mariota said. “We knew that if we kept getting 5- or 6-yard chunks, we were going to get into a rhythm.”

Brett Hundley completed 13 of 19 passes for 64 yards and a touchdown but also threw two interceptions, including one early in the fourth quarter that led to an Oregon touchdown. He also ran for 64 yards and a score.

“That was a very disappointing loss,” Bruins coach Jim Mora said. “We didn’t come up here to play them close, we didn’t come up here to give it the old college try. We came up here to win the game and we didn’t get it done, and it’s very disappointing.”

UCLA, which has now lost two straight after falling to Stanford last week, has not won at Autzen Stadium since 2004, and hasn’t defeated the Ducks since a 16-0 blanking in 2007. The teams last met in 2011, when Oregon downed UCLA 49-31 in the inaugural Pac-12 championship game.

The Ducks are the highest-ranked opponent the Bruins have faced since they played the No. 1-ranked Ducks in the 2010 season. Last weekend UCLA fell 24-10 to No. 13 Stanford.

Oregon, ranked No. 3 in the initial BCS rankings released last weekend, was coming off a 62-38 victory at home over Washington State. The Ducks have played one other game against a ranked opponent this season — a 45-24 victory over then-No. 16 Washington at Husky Stadium.

“In the first half we had a couple of runs we’d like to have back, and we had a couple of throws we’d like to have back,” Ducks coach Mark Helfrich said. “But we finished right where we wanted to finish.”