San Francisco 49ers safety Darcel McBath (32) celebrates after intercepting a pass with safety Dashon Goldson (38) against the San Diego Chargers first quarter of an NFL preseason football game in San Francisco, Thursday, Aug. 30, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers running back Anthony Dixon (24) runs against the San Diego Chargers during the first quarter of an NFL preseason football game in San Francisco, Thursday, Aug. 30, 2012. (AP Photo/Marcio Jose Sanchez)

San Diego Chargers running back Ronnie Brown (30) runs against San Francisco 49ers linebacker Eric Bakhtiari (44) during the first quarter of an NFL preseason football game in San Francisco, Thursday, Aug. 30, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers running back Anthony Dixon (24) celebrates after scoring a touchdown with fullback Bruce Miller (49) against the San Diego Chargers during the first quarter of an NFL preseason football game in San Francisco, Thursday, Aug. 30, 2012. (AP Photo/Ben Margot)

San Diego Chargers tight end Antonio Gates (85) fumbles in front of San Francisco 49ers safety C.J. Spillman (27), which was recovered by 49ers free safety Trenton Robinson, during the first quarter of an NFL preseason football game in San Francisco, Thursday, Aug. 30, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers quarterback Colin Kaepernick (7) passes against the San Diego Chargers during the first quarter of an NFL preseason football game in San Francisco, Thursday, Aug. 30, 2012. (AP Photo/Ben Margot)

San Diego Chargers quarterback Philip Rivers (17) passes against the San Francisco 49ers during the first quarter of an NFL preseason football game in San Francisco, Thursday, Aug. 30, 2012. (AP Photo/Ben Margot)

San Francisco 49ers tight end Delanie Walker (46) scores on a touchdown reception past San Diego Chargers defensive back Eric Weddle (32) during the first quarter of an NFL preseason football game in San Francisco, Thursday, Aug. 30, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers wide receiver A.J. Jenkins (17) runs from San Diego Chargers linebacker Shaun Phillips (95) during the first quarter of an NFL preseason football game in San Francisco, Thursday, Aug. 30, 2012. (AP Photo/Marcio Jose Sanchez)

San Diego Chargers running back Ronnie Brown (30) flips over San Francisco 49ers cornerback Chris Culliver (29) during the first half of an NFL preseason football game in San Francisco, Thursday, Aug. 30, 2012. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers defensive end Tony Jerod-Eddie reaches for a loose ball in front of San Diego Chargers wide receiver Eddie Royal (11) during the first half of an NFL preseason football game in San Francisco, Thursday, Aug. 30, 2012. (AP Photo/Marcio Jose Sanchez)

August 30, 2012; San Francisco, CA, USA; San Francisco 49ers quarterback Colin Kaepernick (7) hands the ball off to running back Rock Cartwright (28) during the second quarter against the San Diego Chargers at Candlestick Park. Mandatory Credit: Kyle Terada-US PRESSWIRE

August 30, 2012; San Francisco, CA, USA; San Francisco 49ers tight end Garrett Celek (48) is pushed out of bounds by San Diego Chargers defensive back Corey Lynch (41) during the second quarter at Candlestick Park. Mandatory Credit: Kyle Terada-US PRESSWIRE

August 30, 2012; San Francisco, CA, USA; San Francisco 49ers wide receiver Brett Swain (18) is unable to make the catch against the San Diego Chargers during the first quarter at Candlestick Park. Mandatory Credit: Kelley L Cox-US PRESSWIRE

August 30, 2012; San Francisco, CA, USA; San Francisco 49ers tight end Delanie Walker (46) escapes San Diego Chargers safety Darrell Stuckey (25) during the first quarter at Candlestick Park. Mandatory Credit: Kelley L Cox-US PRESSWIRE

August 30, 2012; San Francisco, CA, USA; San Francisco 49ers running back Anthony Dixon (24) celebrates after the touchdown against the San Diego Chargers during the first quarter at Candlestick Park. Mandatory Credit: Kelley L Cox-US PRESSWIRE