San Diego Chargers cornerback Antoine Cason, left, and San Francisco 49ers wide receiver Ted Ginn Jr., battle for the ball during the first quarter of their NFL preseason football game in San Francisco, Thursday, Sept. 2, 2010. Pass interference was called on the play. (AP Photo/Tony Avelar)

San Diego Chargers wide receiver Buster Davis, right, makes a reception as San Francisco 49ers cornerback Phillip Adams, left, looks on during the second quarter of their NFL preseason football game in San Francisco, Thursday, Sept. 2, 2010. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers running back Anthony Dixon, left, and quarterback David Carr, right, celebrate after Dixon scored a touchdown on a 46-yard rung during the first quarter of their NFL preseason football game against the San Diego Chargers in San Francisco, Thursday, Sept. 2, 2010. (AP Photo/Tony Avelar)

San Diego Chargers running back Mike Tolbert (35), rushes with the ball before being brought down by San Francisco 49ers linebacker Manny Lawson, left, as 49ers linebacker Parys Haralson, top and 49ers safety Dashon Goldson, right, look on during the first quarter of their NFL preseason football game in San Francisco, Thursday, Sept. 2, 2010. (AP Photo/Tony Avelar)

San Diego Chargers quarterback Billy Volek, right, is sacked by San Francisco 49ers linebackers Matt Wilhelm, center, and NaVorro Bowman, left, during the first quarter of their NFL preseason football game in San Francisco, Thursday, Sept. 2, 2010. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers running back Anthony Dixon, right, runs with the ball for a 46-yard touchdown past San Diego Chargers defensive tackle Cam Thomas, left, during the first quarter of their NFL preseason football game in San Francisco, Thursday, Sept. 2, 2010. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers quarterback David Carr, left, is hit by San Diego Chargers linebacker Brandon Siler, right, during the first quarter of their NFL preseason football game in San Francisco, Thursday, Sept. 2, 2010. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers wide receiver Dominique Zeigler, left, runs with the ball as San Diego Chargers cornerback Antoine Cason, right, tries to make a tackle during the second quarter of their NFL preseason football game in San Francisco, Thursday, Sept. 2, 2010. (AP Photo/Marcio Jose Sanchez)

San Diego Chargers head coach Norv Turner watches from the sidelines during the second quarter of their NFL preseason football game against the San Francisco 49ers in San Francisco, Thursday, Sept. 2, 2010. (AP Photo/Tony Avelar)

San Diego Chargers wide receiver Demetrius Byrd, left, runs with the ball as San Francisco 49ers cornerback Phillip Adams, right, tries to make a tackle during the second quarter of their NFL preseason football game in San Francisco, Thursday, Sept. 2, 2010. (AP Photo/Tony Avelar)

San Francisco 49ers quarterback Nate Davis, right, runs with the ball past San Diego Chargers linebacker Brandon Siler, left, during the second quarter of their NFL preseason football game in San Francisco, Thursday, Sept. 2, 2010. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers head coach Mike Singletary looks on during the second half of a preseason NFL football game against the San Diego Chargers in San Francisco, Thursday, Sept. 2, 2010. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers tight end Nate Byham, runs with the ball as San Diego Chargers linebacker Antwan Applewhite, bottom, tries to make the tackle during the fourth quarter of their NFL preseason football game in San Francisco, Thursday, Sept. 2, 2010. (AP Photo/Tony Avelar)

San Francisco 49ers running back Jehuu Caulcrick runs in for a touchdown on a two-yard pass from quarterback Nate Davis during the fourth quarter of their NFL preseason football game against the San Diego Chargers in San Francisco, Thursday, Sept. 2, 2010. (AP Photo/Tony Avelar)

San Diego Chargers wide receiver Jeremy Williams, right, is greeted by teammate Curtis Brinkley, left, after scoring a touchdown on a 93-yard punt return during the third quarter of their NFL preseason football game against the San Francisco 49ers in San Francisco, Thursday, Sept. 2, 2010. (AP Photo/Tony Avelar)

San Diego Chargers running back Curtis Brinkley tumbles into the endzone to score a touchdown on a two-yard rung during the third quarter of their NFL preseason football game in San Francisco, Thursday, Sept. 2, 2010. At left is San Francisco 49ers linebacker Keaton Kristick and at right is San Diego Chargers guard Cameron Stephenson. (AP Photo/Marcio Jose Sanchez)

San Diego Chargers wide receiver Jeremy Williams, right, catches the ball for a first down as San Francisco 49ers cornerback Karl Paymah, left, looks on during the third quarter of their NFL preseason football game in San Francisco, Thursday, Sept. 2, 2010. (AP Photo/Tony Avelar)

San Diego Chargers wide receiver Jeremy Williams runs for a touchdown on a 93-yard punt return during the third quarter of their NFL preseason football game against the San Francisco 49ers in San Francisco, Thursday, Sept. 2, 2010. (AP Photo/Tony Avelar)