Houston Texans quarterback Matt Schaub (8) scrambles against the San Francisco 49ers in the first half of a preseason NFL football game in San Francisco, Saturday, Aug. 27, 2011. (AP Photo/Paul Sakuma)

Houston Texans quarterback Matt Schaub (8) passes as San Francisco 49ers defensive tackle Justin Smith (94) closes in during the first quarter of a preseason NFL football game in San Francisco, Saturday, Aug. 27, 2011. (AP Photo/Marcio Jose Sanchez)

Houston Texans running back Arian Foster (23) is tackled by San Francisco 49ers cornerback Carlos Rogers (22) as linebacker Ahmad Brooks (55) approaches in the first quarter of a preseason NFL football game in San Francisco, Saturday, Aug. 27, 2011. (AP Photo/Marcio Jose Sanchez)

Houston Texans wide receiver Andre Johnson (80) falls forward as he is tackled by San Francisco 49ers safety Dashon Goldson (38) in the first quarter of a preseason NFL football game in San Francisco, Saturday, Aug. 27, 2011. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers linebacker Ahmad Brooks, left, celebrates after scoring on a touchdown on an interception of Houston Texans quarterback Matt Schaub, with linebacker Patrick Willis in the first quarter of a preseason NFL football game in San Francisco, Saturday, Aug. 27, 2011. (AP Photo/Marcio Jose Sanchez)

Houston Texans safety Troy Nolan (33) runs with an interception of a pass by San Francisco 49ers quarterback Alex Smith in the second quarter of a preseason NFL football game in San Francisco, Saturday, Aug. 27, 2011. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers quarterback Alex Smith walks toward the sidelines in the second quarter of a preseason NFL football game against the Houston Texans in San Francisco, Saturday, Aug. 27, 2011. (AP Photo/Paul Sakuma)

San Francisco 49ers running back Frank Gore watches from the sidelines as the 49ers played the Houston Texans in the second quarter of a preseason NFL football game in San Francisco, Saturday, Aug. 27, 2011. (AP Photo/Paul Sakuma)

San Francisco 49ers quarterback Alex Smith passes against the Houston Texans in the first half of a preseason NFL football game in San Francisco, Saturday, Aug. 27, 2011. (AP Photo/Paul Sakuma)

Houston Texans running back Ben Tate is tackled by San Francisco 49ers safety Madieu Williams (20) in the second quarter of a preseason NFL football game in San Francisco, Saturday, Aug. 27, 2011. (AP Photo/Paul Sakuma)

Houston Texans wide receiver Andre Johnson (80) is tackled by San Francisco 49ers safety Donte Whitner (31) in the first half of a preseason NFL football game in San Francisco, Saturday, Aug. 27, 2011. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers coach Jim Harbaugh watches from the sidelines in the second half of a preseason NFL football game against the Houston Texans in San Francisco, Saturday, Aug. 27, 2011. (AP Photo/Paul Sakuma)

San Francisco 49ers quarterback Alex Smith watches from the sidelines in the second half of a preseason NFL football game against the Houston Texans in San Francisco, Saturday, Aug. 27, 2011. (AP Photo/Paul Sakuma)

Houston Texans quarterback Matt Leinart passes against the San Francisco 49ers in the second half of a preseason NFL football game in San Francisco, Saturday, Aug. 27, 2011. (AP Photo/Paul Sakuma)

San Francisco 49ers quarterback Colin Kaepernick (7) stiff-arms Houston Texans linebacker Brooks Reed (58) in the third quarter of a preseason NFL football game in San Francisco, Saturday, Aug. 27, 2011. (AP Photo/Marcio Jose Sanchez)

Houston Texans defensive coordinator Wade Phillips stands on the sidelines in the fourth quarter of the Texans' preseason NFL football game against the San Francisco 49ers in San Francisco, Saturday, Aug. 27, 2011. (AP Photo/Marcio Jose Sanchez)

Houston Texans running back Arian Foster (23) runs against San Francisco 49ers cornerback Carlos Rogers (22) and linebacker Ahmad Brooks (55) in the first quarter of a preseason NFL football game in San Francisco, Saturday, Aug. 27, 2011. (AP Photo/Marcio Jose Sanchez)

Houston Texans coach Gary Kubiak, right, walks on the field next to quarterback Matt Leinart (11) in the first quarter of a preseason NFL football game against the San Francisco 49ers in San Francisco, Saturday, Aug. 27, 2011. (AP Photo/Marcio Jose Sanchez)

Houston Texans running back Derrick Ward (32) celebrates after scoring a touchdown against the San Francisco 49ers in the first quarter of a preseason NFL football game in San Francisco, Saturday, Aug. 27, 2011. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers coach Jim Harbaugh looks on as his team plays the Houston Texans during the fourth quarter of a preseason NFL football game in San Francisco, Saturday, Aug. 27, 2011. (AP Photo/Paul Sakuma)