Houston Texans quarterback Matt Schaub (8) is hit as he releases the ball by defensive end Jared Allen (69) during a NFL football game against the Minnesota Vikings, Monday, August 31, 2009 in Houston. The Vikings won the game 17-10. (AP Photo/Paul Jasienski)

Minnesota Vikings running back Adrian Peterson (28) runs with the ball during a NFL football game against the Houston Texans, Monday, August 31, 2009 in Houston. The Vikings won the game 17-10. (AP Photo/Paul Jasienski)

Minnesota Vikings quarterback Brett Favre (4) throws a pass agianst the Houston Texans during the third quarter of a preseason NFL football game at Reliant Park Monday, Aug. 31, 2009 in Houston. (AP Photo/David J. Phillip)

Minnesota Vikings quarterback Brett Favre (4) avoids Houston Texans defenders Amobi Okoye (91) and Mario Williams during the first quarter of an NFL football game Monday, Aug. 31, 2009, in Houston. (AP Photo/David J. Phillip)

Minnesota Vikings' Chester Taylor (29) scores a touchdown despite the efforts of Houston Texans defenders DeMeco Ryans (59) and Connor Barwin (98) during the second quarter of a preseason NFL football game Monday, Aug. 31, 2009, in Houston. (AP Photo/Dave Einsel)

Minnesota Vikings' Jared Allen (69) and Chad Greenway (52) in a NFL football game against the Houston Texans Monday, Aug. 31, 2009 in Houston. (AP Photo/David J. Phillip)

Houston Texans fans during the second quarter of a NFL football game against the Minnesota Vikings at Reliant Park Monday, Aug. 31, 2009 in Houston. (AP Photo/Dave Einsel)

Houston Texans cheerleaders perform during the fourth quarter of a preseason NFL football game against the Minnesota Vikings at Reliant Park Monday, Aug. 31, 2009 in Houston. (AP Photo/Dave Einsel)

A Houston Texans cheerleader performs during the third quarter of a preseason NFL football game against the Minnesota Vikings at Reliant Park Monday, Aug. 31, 2009 in Houston. (AP Photo/Dave Einsel)

Minnesota Vikings running back Adrian Peterson (28) during the second quarter of a NFL football game against the Houston Texans at Reliant Park Monday, Aug. 31, 2009 in Houston. (AP Photo/Dave Einsel)

Houston Texans quarterback Matt Schaub (8) hands off to running back Chris Brown (22) during a NFL football game against the Minnesota Vikings, Monday, August 31, 2009 in Houston. The Vikings won the game 17-10. (AP Photo/Paul Jasienski)