Pro Bowl outside linebackers Terrell Suggs and Elvis Dumervil entered Sunday with a combined 17 sacks, but were stonewalled by the Bears’ offensive line.

They combined for just one tackle and no sacks.

“They were chipping the edges quite a bit,” Ravens coach John Harbaugh said. “That had a lot to do with it. It was a tough pass rush day as far as the field conditions. But they were chipping the edges for the most part all day, then getting guys out.”

Dumervil also was flagged for unnecessary roughness when he shoved Bears quarterback Josh McCown to the ground in the fourth quarter.

“They're supposed to give you a step-and-a-half,” said Dumervil, who had three sacks the previous game against the Cincinnati Bengals. “I was definitely within the step. I thought that was a weak call.”

Harbaugh mum on injuries

Harbaugh provided no injury updates Monday other than saying there were no serious injuries Sunday.

"We'll have our injury report on Wednesday, but we look pretty good there," Harbaugh said.

Pro Bowl nose tackle Haloti Ngata missed the game with a left knee injury.

When asked if Ngata didn't play because of the weather, Harbaugh declined to elaborate on the reasons for his inactive status.

"I'm not getting into all that," Harbaugh said. "There's no reason for us to put that out there publicly. What advantage would there be for us to comment on that? It wouldn't help us, but I appreciate you asking.”

Terrence Cody started in place of Ngata and had one tackle.

“We hope Haloti's back soon,” Cody said. “If he's not, I got to carry the load."

Rookie wide receiver Marlon Brown missed the game with a knee injury, but said he’ll be back Sunday against the New York Jets.

“I'll be fine this week,” he said. “It's just bruised. I'll be good."

Harbaugh defends Yanda

Throughout the season, offensive guard Marshal Yanda has moved around to signal to his teammates before the snap.

The NFL allows offensive linemen to do so as long as it’s not disruptive to the defense and is regularly utilized.

Yanda was flagged for a false start Sunday, though. And Bears coach Marc Trestman said Monday that he’s going to submit examples of Yanda’s pre-snap movements that he claimed led to Bears offside penalties.

However, Harbaugh said Yanda is operating within the rules.