CHICAGO — Lance Briggs couldn't hide his emotions. He smiled, he broke into a rap and even showed off his dance moves as he got dressed after the Chicago Bears showed how serious they are about contending for the NFC title.

The Bears linebacker had reason to be giddy. Chicago just finished dominating the defending conference champion Seattle Seahawks.

Rex Grossman threw for 232 yards and Ricky Manning Jr. intercepted two of Matt Hasselbeck's passes to lead Chicago to a 37-6 victory over the Seattle Seahawks (3-1) last night.

"Thirty seven-six just shows what we're capable of, but we're a lot better than that," Grossman said. "They're a lot better than they played tonight and we realize that. ... We realize we may face them down the road at some point, and we're glad we got the win."

Grossman had another solid performance, completing 17 of 31 passes with two touchdowns and no interceptions, and the Bears improved to 4-0 for the first time since 1991.

Bernard Berrian had three receptions for a career-high 108 yards and a touchdown.

The Bears also got their running game going, with Thomas Jones rushing for 98 yards and two touchdowns.

And the league's fourth-ranked defense shut down a Seahawks team that was missing injured running back Shaun Alexander.

"We definitely sent a message," Briggs said. "We're out to send a message every week. Every week, we gain another believer."

With the Bears leading 10-3, Manning intercepted Hasselbeck twice in the second quarter to set up a field goal and touchdown.