San Francisco 49ers linebacker Patrick Willis (52) celebrates after cornerback Tarell Brown (25) intercepted the Oakland Raiders in the second quarter of a preseason NFL football game in San Francisco, Saturday, Aug. 20, 2011. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers safety Madieu Williams (20) intercepts a pass intended for Oakland Raiders fullback Manase Tonga (41) during the second half of a preseason NFL football game in San Francisco, Saturday, Aug. 20, 2011. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers head coach Jim Harbaugh stands on the sidelines during the second half of a preseason NFL football game against the Oakland Raiders in San Francisco, Saturday, Aug. 20, 2011. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers head coach Jim Harbaugh, left, shakes hands with Oakland Raiders head coach Hue Jackson after a preseason NFL football game in San Francisco, Saturday, Aug. 20, 2011. The 49ers won 17-3. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers running back Kendall Hunter (32) is tackled by Oakland Raiders safety Josh Bullocks (46) during the second half of a preseason NFL football game in San Francisco, Saturday, Aug. 20, 2011. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers quarterback Colin Kaepernick (7) runs from Oakland Raiders linebacker Darryl Blackstock (56) in the second half of a preseason NFL football game in San Francisco, Saturday, Aug. 20, 2011. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers quarterback Alex Smith (11) passes against the Oakland Raiders in the first half of a preseason NFL football game in San Francisco, Saturday, Aug. 20, 2011. (AP Photo/Ben Margot)

San Francisco 49ers quarterback Alex Smith (11) scrambles away from the Oakland Raiders pass rush in the first half of a preseason NFL football game in San Francisco, Saturday, Aug. 20, 2011. (AP Photo/Marcio Jose Sanchez)

Oakland Raiders quarterback Jason Campbell (8) is tackled by San Francisco 49ers defensive tackle Justin Smith, left, as linebacker Ahmad Brooks (55) lands on him in the first half of a preseason NFL football game in San Francisco, Saturday, Aug. 20, 2011. Campbell left the game after the play. (AP Photo/Marcio Jose Sanchez)

August 20, 2011; San Francisco, CA, USA; San Francisco 49ers wide receiver Braylon Edwards (81) drops a catch while defended by Oakland Raiders safety Tyvon Branch (33) during the first quarter at Candlestick Park. Mandatory Credit: Kyle Terada-US PRESSWIRE

San Francisco 49ers wide receiver Braylon Edwards (81) is tackled by Oakland Raiders safety Michael Huff (24) durin the first quarter of a preseason NFL football game in San Francisco, Saturday, Aug. 20, 2011. (AP Photo/Marcio Jose Sanchez)

ALTERNATE CROP - San Francisco 49ers wide receiver Braylon Edwards (81) is tackled by Oakland Raiders safety Michael Huff (24) durin the first quarter of a preseason NFL football game in San Francisco, Saturday, Aug. 20, 2011. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers running back Anthony Dixon (24) is tackled by Oakland Raiders defensive end Matt Shaughnessy (77) and safety Michael Huff (24) during the first quarter of a preseason NFL football game in San Francisco, Saturday, Aug. 20, 2011. (AP Photo/Ben Margot)

San Francisco 49ers quarterback Alex Smith (11) passes as Oakland Raiders defensive end Matt Shaughnessy (77) is blocked trying to rush during the first quarter of a preseason NFL football game in San Francisco, Saturday, Aug. 20, 2011. (AP Photo/Marcio Jose Sanchez)

August 20, 2011; San Francisco, CA, USA; San Francisco 49ers quarterback Alex Smith (11) passes the ball during the first quarter against the Oakland Raiders at Candlestick Park. Mandatory Credit: Kyle Terada-US PRESSWIRE

Oakland Raiders wide receiver Darrius Heyward-Bey (85) makes a catch over San Francisco 49ers safety Dashon Goldson (38) and cornerback Chris Culliver defend during the second quarter of a preseason NFL football game in San Francisco, Saturday, Aug. 20, 2011. (AP Photo/Marcio Jose Sanchez)

Oakland Raiders tight end Kevin Boss (87) is tackled by San Francisco 49ers cornerback Tarell Brown (25) during the first half of a preseason NFL football game in San Francisco, Saturday, Aug. 20, 2011. (AP Photo/Marcio Jose Sanchez)

Oakland Raiders quarterback Jason Campbell (8) walks off the field after being tackled by San Francisco 49ers defensive tackle Justin Smith (94) and linebacker Ahmad Brooks (55) in the second quarter of a preseason NFL football game in San Francisco, Saturday, Aug. 20, 2011. (AP Photo/Ben Margot)

Oakland Raiders quarterback Jason Campbell (8) fumbles the ball as he is pursued by San Francisco 49ers defensive tackle Justin Smith (94) during the second quarter of a preseason NFL football game in San Francisco, Saturday, Aug. 20, 2011. (AP Photo/Ben Margot)

San Francisco 49ers running back Anthony Dixon (24) is tackled by Oakland Raiders defensive end Matt Shaughnessy (77) and safety Michael Huff (24) during the first quarter of a preseason NFL football game in San Francisco, Saturday, Aug. 20, 2011. (AP Photo/Ben Margot)

San Francisco 49ers running back Kendall Hunter (32) runs past Oakland Raiders safety Jerome Boyd (40) to score a touchdown in the third quarter of a preseason NFL football game in San Francisco, Saturday, Aug. 20, 2011. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers running back Kendall Hunter (32) scores a touchdown past Oakland Raiders cornerback Walter McFadden (22) and linebacker Darryl Blackstock (56) in the third quarter of a preseason NFL football game in San Francisco, Saturday, Aug. 20, 2011. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers quarterback Colin Kaepernick (7) is sacked by Oakland Raiders defensive end Jarvis Moss (94) and defensive tackle Desmond Bryant (90) in the third quarter of a preseason NFL football game in San Francisco, Saturday, Aug. 20, 2011. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers wide receiver Braylon Edwards is tackled by Oakland Raiders safety Michael Huff (24) and cornerback DeMarcus Van Dyke (38) in the first quarter of an NFL preseason football game in San Francisco, Saturday, Aug. 20, 2011. (AP Photo/Ben Margot)

San Francisco 49ers head coach Jim Harbaugh during a preseason NFL football game against the Oakland Raiders in San Francisco, Saturday, Aug. 20, 2011. (AP Photo/Marcio Jose Sanchez)

An Oakland Raiders fan is shown before an NFL preseason football game between the San Francisco 49ers and the Oakland Raiders in San Francisco, Saturday, Aug. 20, 2011. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers running back Anthony Dixon (24) runs against the Oakland Raiders during a preseason NFL football game in San Francisco, Saturday, Aug. 20, 2011. (AP Photo/Ben Margot)

San Francisco 49ers running back Kendall Hunter (32) runs against the Oakland Raiders in a preseason NFL football game in San Francisco, Saturday, Aug. 20, 2011. (AP Photo/Marcio Jose Sanchez)

San Francisco 49ers cheerleaders perform during an NFL preseason football game against the Oakland Raiders in San Francisco, Saturday, Aug. 20, 2011. (AP Photo/Ben Margot)

San Francisco 49ers wide receiver Braylon Edwards (81) drops a pass as he is defended by Oakland Raiders safety Tyvon Branch (33) in the first half of an NFL preseason football game in San Francisco, Saturday, Aug. 20, 2011. (AP Photo/Marcio Jose Sanchez)