Houston Texans' Shayne Graham (17) kicks a field goal as Donnie Jones (5) holds the ball to put the Texans on the score board against the San Francisco 49ers in the first quarter an NFL preseason football game Saturday, Aug. 18, 2012, in Houston. (AP Photo/Dave Einsel)

San Francisco 49ers' Chris Culliver (29) gets a hold on Houston Texans' Keshawn Martin (82) in the first quarter an NFL preseason football game Saturday, Aug. 18, 2012, in Houston. (AP Photo/David J. Phillip)

San Francisco 49ers' Brandon Jacobs (46) is helped off by coach Jim Harbaugh in the first quarter an NFL preseason football game against the Houston Texans Saturday, Aug. 18, 2012, in Houston. (AP Photo/David J. Phillip)

Houston Texans' Kareem Jackson (25) gets a good hold on San Francisco 49ers' Randy Moss in the first quarter an NFL preseason football game Saturday, Aug. 18, 2012, in Houston. (AP Photo/David J. Phillip)

San Francisco 49ers coach Jim Harbaugh yells from the sidelines in the first quarter an NFL preseason football game against the Houston Texans Saturday, Aug. 18, 2012, in Houston. (AP Photo/David J. Phillip)

Houston Texans Antonio Smith (94) and Johnathan Joseph (24) celebrate a sack of San Francisco 49ers quarterback Alex Smith in the first quarter an NFL preseason football game Saturday, Aug. 18, 2012, in Houston. (AP Photo/David J. Phillip)

San Francisco 49ers quarterback Alex Smith scrambles with the ball against the Houston Texans in the first quarter an NFL preseason football game Saturday, Aug. 18, 2012, in Houston. (AP Photo/Dave Einsel)

San Francisco 49ers' Chris Culliver, left, hangs onto the shirttail of Houston Texans' Arian Foster (23) in the first quarter an NFL preseason football game Saturday, Aug. 18, 2012, in Houston. (AP Photo/David J. Phillip)

San Francisco 49ers' Brandon Jacobs (46) gets hit hard by Houston Texans' Bradie James (53) in the first quarter an NFL preseason football game Saturday, Aug. 18, 2012, in Houston. Jacobs was helped off the field after this play. (AP Photo/David J. Phillip)

Houston Texans' Glover Quin drops a would be interception on a pass thrown by San Francisco 49ers' Alex Smith in the first quarter an NFL preseason football game Saturday, Aug. 18, 2012, in Houston. (AP Photo/Dave Einsel)

San Francisco 49ers' Kendall Hunter, center, is held up by Houston Texans Danieal Manning (38) and Brice McCain, left, in the first quarter an NFL preseason football game Saturday, Aug. 18, 2012, in Houston. (AP Photo/Dave Einsel)

Houston Texans wide receiver Andre Johnson (80) celebrates after catching a pass for a first down in the second quarter an NFL preseason football game against the San Francisco 49ers Saturday, Aug. 18, 2012, in Houston. (AP Photo/David J. Phillip)

San Francisco 49ers quarterback Alex Smith (11) scrambles away from Houston Texans outside linebacker Connor Barwin (98) in the second quarter an NFL preseason football game Saturday, Aug. 18, 2012, in Houston. (AP Photo/David J. Phillip)

San Francisco 49ers' Michael Crabtree (15) reaches for a pass as he's grabbed by Houston Texans' Brice McCain (21) in the first quarter an NFL preseason football game Saturday, Aug. 18, 2012, in Houston. (AP Photo/David J. Phillip)

Houston Texans' Lestar Jean, left, falls in to the end zone for a touchdown despite the efforts of San Francisco 49ers' Tramaine Brock in the second quarter an NFL preseason football game Saturday, Aug. 18, 2012, in Houston. (AP Photo/David J. Phillip)

Aug 18, 2012; Houston, TX, USA; San Francisco 49ers running back Kendall Hunter (32) runs the ball against the Houston Texans in the second quarter at Reliant Stadium. Mandatory Credit: Brett Davis-US PRESSWIRE

Aug 18, 2012; Houston, TX, USA; Houston Texans wide receiver Andre Johnson (80) catches a pass against the San Francisco 49ers in the second quarter at Reliant Stadium. Mandatory Credit: Brett Davis-US PRESSWIRE

August 18, 2012; Houston, TX, USA; Houston Texans wide receiver Andre Johnson (80) makes a receptionduring the second quarter against the 49ers at Reliant Stadium. Mandatory Credit: Troy Taormina-US PRESSWIRE

August 18, 2012; Houston, TX, USA; San Francisco 49ers quarterback Alex Smith (11) attempts a pass during the first quarter against the Houston Texans at Reliant Stadium. Mandatory Credit: Troy Taormina-US PRESSWIRE

Houston Texans' Trindon Holliday (16) is all alone as he runs down the sidelines on his way to a touchdown against the San Francisco 49ers in the fourth quarter an NFL preseason football game Saturday, Aug. 18, 2012, in Houston. (AP Photo/David J. Phillip)

Houston Texans' Brandon Harris (26) upends San Francisco 49ers quarterback Josh Johnson (1) in the fourth quarter an NFL preseason football game Saturday, Aug. 18, 2012, in Houston. (AP Photo/David J. Phillip)

August 18, 2012; Houston, TX, USA; Houston Texans cheerleaders perform during the second quarter against the 49ers at Reliant Stadium. Mandatory Credit: Troy Taormina-US PRESSWIRE

San Francisco 49ers defensive back Chris Culliver (29) grabs the jersey of Houston Texans running back Arian Foster (23) in the first quarter an NFL preseason football game Saturday, Aug. 18, 2012, in Houston. (AP Photo/David J. Phillip)

Houston Texans' Trindon Holliday (16) eludes San Francisco 49ers punter Andy Lee (4) as he returns a punt for a touchdown in the fourth quarter an NFL preseason football game Saturday, Aug. 18, 2012, in Houston. (AP Photo/David J. Phillip)

San Francisco 49ers' Josh Johnson (1) in the fourth quarter an NFL preseason football game against the Houston Texans Saturday, Aug. 18, 2012, in Houston. (AP Photo/David J. Phillip)