BERKELEY -- While Cal coach Sonny Dykes confirmed Jared Goff and Zach Kline will duel this week for the starting quarterback job, Jordan Rigsbee says the line takes responsibility for the Bears' recent offensive slide.

"We feel like for the most part the offense struggling a lot of times is on us," said Rigsbee, a sophomore starting left guard. "It doesn't matter how good your (skill) guys are, if you don't have a good O-line, you can't play."

The Bears (1-6, 0-4 Pac-12), who visit Washington on Saturday night, have slumped sufficiently that Dykes pulled freshman Goff in favor of redshirt freshman Kline in the third quarter of the 49-17 loss to Oregon State.

It's not that simple, said Rigsbee, who took snaps as the first-team center Tuesday. But he's at a loss to explain why the offensive has averaged just 13.5 points and 343 yards the past two games after producing 27.8 points and more than 515 yards the first five outings.

"I've been asking myself the same thing," Rigsbee said. "As a young team, it's easy to have a couple good games. The great teams are the teams that can string multiple good games together."

The Bears have struggled most of the season to run the ball, and defenses may be catching up to their one-dimensional nature, Dykes said.

"If we can run the ball it keeps us out of third down and long and makes the quarterback's job a lot easier," said Dykes, whose team is 10th in the Pac-12 in rushing offense and last in sacks allowed.

Offensive production is down sharply across the board the past two games, which includes a 37-10 loss at UCLA.

The Bears are averaging 12 fewer plays, seven fewer first downs and their third-down efficiency has dropped from 40 percent to 32 percent.

Center Chris Adcock (knee) and guard Matt Cochran (ankle) are sidelined by injury and tackle Steven Moore (strep throat) saw limited action against OSU, forcing less-experienced players onto the field. Dykes said after practice he is taking true freshman Chris Borrayo out of his redshirt year and will give him a chance at guard.

"They're doing the best they can," Dykes said, "but we're losing some of those one-on-one matchups."

Dykes acknowledged there has been a learning curve picking up new run-game blocking schemes in the Bear Raid offense.

But he defended Zach Yenser, the Bears' 29-year-old, first-time head line coach, who came with him from Louisiana Tech and also played line in the same system in college.

"I don't think his perceived lack of experience is having any impact on our performance," Dykes said. "We've got complete, total trust in him. I think the linemen feel the same way."

Said Rigsbee, "We all want to play for him like nobody we've ever had," he said. "It's easy to put the blame on him, but the blame's on us to this point."

  • Goff, the Bears' season-long starter, and Kline are separated by "or" on this week's depth chart and Dykes said he will choose the player he believes brings the most confidence to the assignment.

    Asked if Goff has suffered in that department, Dykes said, "He's like everybody else. He's taken a little bit of a shot to his confidence. It's not all his fault."

    Kline guided the Bears to a pair of touchdowns against Oregon State, but Dykes said he'll need to show a complete grasp of the offense to wrestle the job away.

    "He ran around and made some plays, but sometimes that's not a positive," Dykes said.

  • The Bears took Monday off for the first time this season, Dykes said, because they needed a break physically and mentally.

    "We were just worn out," he said. "It gave them a day where they're not worried about having to practice football or watching film."

    For more on Cal sports, see the Bear Talk blog at ibabuzz.com/beartalk. Follow Jeff Faraudo on Twitter at twitter.com/JeffFaraudo.

    saturday's game
    Cal (1-6, 0-4 Pac-12) at Washington (4-3, 1-3), 8 p.m. Fox Sports 1