2012 Houston Texans preview: Defensive backs

If former first-round pick Jackson lives up to his promise, this will be one of the NFL's best

• Houston Texans stay unbeaten, evolve into AFC's finest
• Houston Texans postgame notes and quotes after beating Titans
• Texans (4-0) pick off Titans
• Texans beat Titans 38-14 to stay undefeated
• Texans 38, Titans 14
• Texans not at best, but still rout Titans
• Titans QB Locker Injures Left Shoulder