The Buccaneers can clinch the NFC South with their fifth straight win when they travel to Reliant Stadium this week to take on the Texans.  The Bucs improved to 8-and-4 and opened up a three-game lead in the NFC South after beating the New Orleans Saints 27-23 in Week 13.  Luke McCown started in place of the injured Jeff Garcia and threw for 313 yards and two scores, including the game-winning strike to Jerramy Stevens in the closing seconds of regulation.  The Texans fell to 5-and-7 after losing 28-20 to the Tennessee Titans last week.  Matt Schaub left the game in the first quarter with a left shoulder injury.  Sage Rosenfels stepped in and threw for 186 yards, one touchdown and an interception.  The Bucs won the only meeting between the two franchises, 16-3, in 2003.