CHICAGO (AP) ó Tony Romo looked desperate early on, scrambling, rushing throws and doing all he could to avoid the Chicago defense. The only thing he didnít do was go away.

Romo passed for 329 yards after a rough start, Anthony Henry had two interceptions for the second straight week and the Dallas Cowboys made a big statement, beating the Bears 34-10 on Sunday night.

The Cowboys showed just how serious a contender they are in the NFC during the second half, outscoring the Bears 31-7. Dallas is 3-0 for the first time since 1999.

Romo again showed that last seasonís rise from obscurity to the Pro Bowl was no fluke, going 22-for-35 with two touchdowns and an interception.

He led the Cowboys on an 89-yard touchdown drive to start the second half, breaking a 3-3 tie. And he put the Cowboys ahead for good, 17-10, with a 10-yard touchdown pass late in the third period that capped a 91-yard drive.

Henry added a 28-yard interception return early in the fourth quarter to make it 27-10, and Marion Barber scored from the 1 after breaking off a 54-yard run.

It was a terrible night all around for the Bears (1-2).

The defending conference champions lost four Pro Bowl players to injuries: linebacker Lance Briggs (groin), cornerback Nathan Vasher (groin), defensive tackle Tommie Harris (knee) and guard Ruben Brown (ankle).

Rex Grossman had another rough outing, going 15-of-32 with 195 yards. He threw three interceptions, did not have a touchdown and was sacked three times ó twice by DeMarcus Ware. Thatís why Grossman heard more boos from the home crowd.

Not that he had much help.

Bernard Berrian caught six passes for 73 yards, but dropped a potential touchdown pass in the first half.

Cedric Benson ran for 46 yards on 16 carries, and the Bears could only muster 239 yards against the 25th-ranked defense. They fumbled three times and lost one. And now, Chicago has 11 turnovers.

Brian Urlacher had two sacks, but the Cowboys finished with 431 yards. After scoring a combined 82 points in the first two games, Dallas perked up in the second half to add to its total.

By the time it was over, Terrell Owens had eight catches for 145 yards. He moved past Michael Irvin into 14th place on the NFLís career list with 12,023 yards and became the 14th player to pass the 12,000-yard mark.

Jason Witten caught six passes for 90 yards and Barber ran for 102 yards on 15 attempts.

Romo, who grew up about 80 miles away in Burlington, Wis., came into the game with a 119.3 rating that ranked second among quarterbacks behind Tom Brady. But he hadnít faced a defense like Chicagoís.

No problem.

After passing for 17 yards in the first quarter, Romo went to work.

He and Owens led the Cowboys on an 89-yard touchdown drive to start the second half to break a 3-3 tie, hitting Owens with a 23-yard pass and two 18-yarders before Wittenís 3-yard scoring catch.