Matt Schaub's first pass for the Texans was for 2 yards. His second one was dropped. This revamped Texans offense sure looks a lot like the old one. Schaub, who replaced David Carr after backing up Michael Vick for three years in Atlanta, had an inauspicious debut going 3-for-5 for 25 yards. But the defending NFC champion Bears scored 13 fourth quarter points, including a 47-yard go-ahead field goal by Robbie Gould with 36 seconds remaining to beat the Texans 20-19 in the exhibition opener for both teams Saturday night.