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Cowboys quarterback Tony Romo had a 300-yard passing game, and Cowboys receiver Dez Bryant had a 100-yard receiving game, but Monday night’s Bears victory in Dallas will be remembered more for what went wrong for Romo and Bryant.

Romo threw five interceptions, and Bryant had three big drops, as the Bears’ defense led the way in a 34-18 victory. Two of Romo’s interceptions were returned for touchdowns, one run back 25 yards by Charles Tillman and one run back 74 yards by Lance Briggs. The opportunistic Bears defense got its hands on the ball all night, although it could have been even worse for Dallas, as the Bears failed to recover any of the Cowboys’ three fumbles.

It was only the second time in Romo’s career that he threw more than three interceptions in a game, and while not all of tonight’s interceptions were his fault — one was tipped and could have been caught, another came when Bryant appeared to run the wrong route — this will be remembered as a game when Romo came up short. In the closing minutes, with the game out of reach, Romo was pulled in favor of Kyle Orton, who marched the Cowboys down the field for a garbage-time touchdown.

Monday night will also be remembered as a game when Bears receiver Brandon Marshall was everything Chicago needs him to be. Marshall had by far his best game with the Bears, catching seven of the eight passes thrown to him, for 138 yards and a touchdown. If Marshall and Jay Cutler can hook up like this every week, the Bears’ offense is going to be tough to stop.

For the Cowboys, who fall to 2-2, it’s hard to figure out what kind of team they are. In two hard-fought wins, over the Giants and Bucs, they’ve played tough, disciplined football. And in two ugly losses, against the Seahawks and Bears, they’ve looked terrible.

But there’s not much doubt about what kind of team the Bears are. They’ve improved to 3-1, with all three wins coming by at least 17 points. The Bears look like contenders.