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

Baltimore Ravens wide receiver Anquan Boldin lands out of bounds under pressure from Washington Redskins safety Oshiomogho Atogwe on an unsuccessful scoring attempt during the first half of an NFL preseason football game in Baltimore, Thursday, Aug. 25, 2011. (AP Photo/Patrick Semansky)

Pittsburgh Steelers wide receiver Hines Ward (86) makes a catch in the end zone for a touchdown in front of Philadelphia Eagles safety Marlin Jackson (28) during the second quarter of an NFL preseason football game on Thursday, Aug. 18, 2011 in Pittsburgh. (AP Photo/Keith Srakocic)

New York Giants wide receiver Domenik Hixon, left, catches a pass for a touchdown over Chicago Bears cornerback Corey Graham (21) during the second quarter of an NFL preseason football game Monday, Aug. 22, 2011, in East Rutherford, N.J. (AP Photo/Bill Kostroun)

Detroit Lions wide receiver Derrick Williams (15) scores a touchdown while eluding a New England Patriots defender in the third quarter of an preseason NFL football game in Detroit, Friday, Aug. 27, 2011. (AP Photo/Rick Osentoski)

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)

Denver Broncos linebacker Mike Mohamed (53) tackles Seattle Seahawks running back Thomas Clayton (45) in the fourth quarter of a preseason NFL football game, Saturday, Aug. 27, 2011, in Denver. (AP Photo/Barry Gutierrez)

Baltimore Ravens running back Ray Rice points to his arm after scoring a touchdown during the first half of an NFL preseason football game against Washington Redskins in Baltimore, Thursday, Aug. 25, 2011. (AP Photo/Nick Wass)

Pittsburgh Steelers linebacker Lawrence Timmons (94) intercepts a pass intended for Atlanta Falcons wide receiver Harry Douglas (83) in the first quarter of the preseason NFL football game on Saturday, Aug. 27, 2011, in Pittsburgh. (AP Photo/Don Wright)

New Orleans Saints running back Pierre Thomas (23) is tackled by Oakland Raiders linebacker Quentin Groves (52), safety Tyvon Branch (33), and safety Michael Huff (24) in the first quarter of a preseason NFL football game in Oakland, Calif., Sunday, Aug. 28, 2011. (AP Photo/Paul Sakuma)

Kansas City Chiefs' Dexter McCluster (22) catches a 10-yard touchdown pass in front of Green Bay Packers' Josh Gordy (40) during the first half of an NFL preseason football game Thursday, Sept. 1, 2011, in Green Bay, Wis. (AP Photo/Mike Roemer)

Pittsburgh Steelers' Jonathan Dwyer, top, is upended by Carolina Panthers' Kevin Payne, bottom, and R.J. Stanford, right, during the third quarter of a preseason NFL football game in Charlotte, N.C., Thursday, Sept. 1, 2011. (AP Photo/Bob Leverone)

San Diego Chargers running back Ryan Mathews (24) runs for a touchdown during a preseason NFL football game against the San Francisco 49ers Thursday, Sept. 1, 2011 in San Diego. (AP Photo/Denis Poroy)

Arizona Cardinals running back William Powell (37) is up-ended by Denver Broncos cornerback Brandon Bing (45) during the second half of an NFL preseason football game, Thursday, Sept. 1, 2011, in Glendale, Ariz. The Cardinals won 26-7. (AP Photo/Rick Scuteri)

New Orleans Saints running back Joique Bell (20) dives for a touchdown over Oakland Raiders linebacker Darryl Blackstock (56) in the third quarter of a preseason NFL football game in Oakland, Calif., Sunday, Aug. 28, 2011. (AP Photo/Paul Sakuma)

San Francisco 49ers Chase Beeler (61) and Ian Williams (64) sack San Diego Chargers quarterback Scott Tolzien (16) during the fourth quarter of a preseason NFL football game Thursday, Sept. 1, 2011 in San Diego. The 49ers won 20-17. (AP Photo/Denis Poroy)