Oakland Raiders running back Darren McFadden (20) rushes against Dallas Cowboys defensive back Orlando Scandrick (32) during the first quarter of an NFL preseason football game in Oakland, Calif., Monday, Aug. 13, 2012. (AP Photo/Tony Avelar)

Oakland Raiders quarterback Carson Palmer (3) looks to throw against the Dallas Cowboys during the first quarter of an NFL preseason football game in Oakland, Calif., Monday, Aug. 13, 2012. (AP Photo/Tony Avelar)

Oakland Raiders defensive tackle Tommy Kelly (93) sacks Dallas Cowboys quarterback Tony Romo (9) during the first quarter of an NFL preseason football game in Oakland, Calif., Monday, Aug. 13, 2012. (AP Photo/Ben Margot)

Dallas Cowboys quarterback Tony Romo (9) passes against the Oakland Raiders during the first quarter of an NFL preseason football game in Oakland, Calif., Monday, Aug. 13, 2012. (AP Photo/Ben Margot)

Dallas Cowboys linebacker Kyle Wilber (51) hits Oakland Raiders quarterback Matt Leinart (7) during the second quarter of an NFL preseason football game in Oakland, Calif., Monday, Aug. 13, 2012. (AP Photo/Tony Avelar)

Oakland Raiders quarterback Terrelle Pryor (6) scrambles away from Dallas Cowboys linebacker Orie Lemon (58) during the third quarter of an NFL preseason football game in Oakland, Calif., Monday, Aug. 13, 2012. (AP Photo/Tony Avelar)

Oakland Raiders head coach Dennis Allen gestures from the sideline during the first half of an NFL preseason football game against the Dallas Cowboys in Oakland, Calif., Monday, Aug. 13, 2012. (AP Photo/Tony Avelar)

Oakland Raiders safety Mike Mitchell (34) returns an interception as Dallas Cowboys wide receiver Dwayne Harris (17) reaches to tackle during the first half of an NFL preseason football game in Oakland, Calif., Monday, Aug. 13, 2012. (AP Photo/Ben Margot)

Dallas Cowboys quarterback Kyle Orton, left, passes as Oakland Raiders linebacker Travis Goethel (50) approaches during the first half of an NFL preseason football game in Oakland, Calif., Monday, Aug. 13, 2012. (AP Photo/Tony Avelar)

Oakland Raiders running back Lonyae Miller (46) runs against the Dallas Cowboys during the second quarter of an NFL preseason football game in Oakland, Calif., Monday, Aug. 13, 2012. (AP Photo/Tony Avelar)

Dallas Cowboys kicker Dan Bailey (5) kicks a field goal from as Chris Jones holds during the second half of an NFL preseason football game against the Oakland Raiders in Oakland, Calif., Monday, Aug. 13, 2012. (AP Photo/Tony Avelar)

Dallas Cowboys head coach Jason Garrett stands on the sideline during the third quarter of an NFL preseason football game against the Oakland Raiders in Oakland, Calif., Monday, Aug. 13, 2012. (AP Photo/Ben Margot)

Oakland Raiders defensive back Brandon Underwood (28) tackles Dallas Cowboys running back Jamize Olawale (49) during the third quarter of an NFL preseason football game in Oakland, Calif., Monday, Aug. 13, 2012. (AP Photo/Ben Margot)

Oakland Raiders head coach Dennis Allen, right, talk with an official during the third quarter of an NFL preseason football game against the Dallas Cowboys in Oakland, Calif., Monday, Aug. 13, 2012. (AP Photo/Tony Avelar)

Oakland Raiders defensive tackle Dominique Hamilton (64) tackles Dallas Cowboys quarterback Rudy Carpenter (11) causing a fumble, which Dallas recovered, during the fourth quarter of an NFL preseason football game in Oakland, Calif., Monday, Aug. 13, 2012. (AP Photo/Ben Margot)

Oakland Raiders quarterback Terrelle Pryor (6) looks to pass as offensive tackle Joe Barksdale (72) blocks Dallas Cowboys defensive end Kenyon Coleman (99) during the second half of an NFL preseason football game in Oakland, Calif., Monday, Aug. 13, 2012. (AP Photo/Ben Margot)

Oakland Raiders head coach Dennis Allen watches during the second half of an NFL preseason football game against the Dallas Cowboys in Oakland, Calif., Monday, Aug. 13, 2012. (AP Photo/Tony Avelar)

Dallas Cowboys wide receiver Dwayne Harris (17) runs against the Oakland Raiders during the second half of an NFL preseason football game in Oakland, Calif., Monday, Aug. 13, 2012. (AP Photo/Ben Margot)

Dallas Cowboys defensive end Ben Bass (79) tackles Oakland Raiders quarterback Terrelle Pryor (6) during the second half of an NFL preseason football game in Oakland, Calif., Monday, Aug. 13, 2012. (AP Photo/Ben Margot)

Oakland Raiders kicker Eddy Carmona (8) reacts after missing a field goal during the fourth quarter of an NFL preseason football game against the Dallas Cowboys in Oakland, Calif., Monday, Aug. 13, 2012. The Cowboys won 3-0. (AP Photo/Tony Avelar)

Dallas Cowboys defensive back Mana Silva, left, celebrates after intercepting a pass with defensive back Orlando Scandrick (32) during the fourth quarter of an NFL preseason football game against the Oakland Raiders in Oakland, Calif., Monday, Aug. 13, 2012. The Cowboys won 3-0. (AP Photo/Tony Avelar)

Oakland Raiders quarterback Terrelle Pryor (6) scrambles against the Dallas Cowboys during the second half of an NFL preseason football game in Oakland, Calif., Monday, Aug. 13, 2012. The Cowboys won 3-0. (AP Photo/Tony Avelar)