Chicago Bears running back Matt Forte (22) celebrates after scoring on a 32-yard touchdown reception, with guard Matt Slauson (68) and tackle Jermon Bushrod (74) during the first quarter of an NFL preseason football game against the Oakland Raiders in Oakland, Calif., Friday, Aug. 23, 2013. (AP Photo/Ben Margot)

Chicago Bears running back Matt Forte (22) carries against Oakland Raiders linebacker Nick Roach (53) during the first quarter of an NFL preseason football game in Oakland, Calif., Friday, Aug. 23, 2013. (AP Photo/Marcio Jose Sanchez)

Chicago Bears tight end Martellus Bennett (83) runs past Oakland Raiders cornerback D.J. Hayden (25) during the first quarter of an NFL preseason football game in Oakland, Calif., Friday, Aug. 23, 2013. (AP Photo/Marcio Jose Sanchez)

Oakland Raiders quarterback Matt Flynn (15) looks to throw as Chicago Bears defensive end Shea McClellin (99) rushes during the first quarter of an NFL preseason football game in Oakland, Calif., Friday, Aug. 23, 2013. (AP Photo/Marcio Jose Sanchez)

Chicago Bears running back Michael Bush (29) scores on a 10-yard touchdown run against the Oakland Raiders during the first quarter of an NFL preseason football game in Oakland, Calif., Friday, Aug. 23, 2013. (AP Photo/Marcio Jose Sanchez)

Chicago Bears quarterback Jay Cutler passes against the Oakland Raiders during the first quarter of an NFL preseason football game in Oakland, Calif., Friday, Aug. 23, 2013. (AP Photo/Ben Margot)

Oakland Raiders cornerback Mike Jenkins (21) pulls on the jersey of Chicago Bears wide receiver Alshon Jeffery (17) during the second quarter of an NFL preseason football game in Oakland, Calif., Friday, Aug. 23, 2013. (AP Photo/Marcio Jose Sanchez)

Chicago Bears running back Michael Bush (29) celebrates his ntouchdown with wide receiver Brandon Marshall (15) during the first quarter of an NFL preseason football game against the Oakland Raiders in Oakland, Calif., Friday, Aug. 23, 2013. (AP Photo/Ben Margot)

Chicago Bears free safety Chris Conte (47), outside linebacker James Anderson, rear, and cornerback Charles Tillman (33) tackle Oakland Raiders wide receiver Denarius Moore during the second quarter of an NFL preseason football game in Oakland, Calif., Friday, Aug. 23, 2013. (AP Photo/Marcio Jose Sanchez)

Chicago Bears quarterback Jay Cutler (6) escapes the grasp of Oakland Raiders defensive tackle Vance Walker (98) during the second quarter of an NFL preseason football game in Oakland, Calif., Friday, Aug. 23, 2013. (AP Photo/Marcio Jose Sanchez)

Chicago Bears quarterback Jay Cutler (6) celebrates a touchdown run by running back Michael Bush during the second quarter of an NFL preseason football game against the Oakland Raiders in Oakland, Calif., Friday, Aug. 23, 2013. (AP Photo/Marcio Jose Sanchez)

Chicago Bears defensive end Corey Wootton (98) and outside linebacker James Anderson (50) tackle Oakland Raiders running back Rashad Jennings (27) during the second quarter of an NFL preseason football game in Oakland, Calif., Friday, Aug. 23, 2013. (AP Photo/Marcio Jose Sanchez)

Oakland Raiders cornerbacks Mike Jenkins (21) and Charles Woodson (24) tackle Chicago Bears wide receiver Alshon Jeffery (17) during the second quarter of an NFL preseason football game in Oakland, Calif., Friday, Aug. 23, 2013. (AP Photo/Ben Margot)

Oakland Raiders quarterback Terrelle Pryor (2) avoids Chicago Bears defensive end Kyle Moore (96) on his 25-yard touchdown run during the third quarter of an NFL preseason football game in Oakland, Calif., Friday, Aug. 23, 2013. (AP Photo/Marcio Jose Sanchez)

Oakland Raiders tight end Nick Kasa, center, scores on a 19-yard touchdown reception between Chicago Bears strong safety Craig Steltz (20), inside linebacker Jon Bostic (57), and free safety Anthony Walters (37) during the third quarter of an NFL preseason football game in Oakland, Calif., Friday, Aug. 23, 2013. (AP Photo/Ben Margot)

Oakland Raiders quarterback Terrelle Pryor (2) throws as Chicago Bears inside linebacker Jon Bostic (57), defensive tackle Christian Tupou (64), and defensive tackle Zach Minter (76) apply pressure during the third quarter of an NFL preseason football game in Oakland, Calif., Friday, Aug. 23, 2013. (AP Photo/Marcio Jose Sanchez)

Oakland Raiders wide receiver Rod Streater (80) catches a pass over Chicago Bears cornerback C.J. Wilson (39) during the third quarter of an NFL preseason football game in Oakland, Calif., Friday, Aug. 23, 2013. (AP Photo/Marcio Jose Sanchez)

Chicago Bears head coach Marc Trestman watches from the sideline during the third quarter of an NFL preseason football game against the Oakland Raiders in Oakland, Calif., Friday, Aug. 23, 2013. (AP Photo/Ben Margot)

Oakland Raiders linebacker Kaelin Burnett (95) and linebacker Omar Gaither (52) try to recover a fumble by Chicago Bears quarterback Josh McCown (12) during the third quarter of an NFL preseason football game in Oakland, Calif., Friday, Aug. 23, 2013. The ball was recovered by Raiders' Reggie Smith. (AP Photo/Marcio Jose Sanchez)

Chicago Bears defensive end Cornelius Washington sacks Oakland Raiders quarterback Matthew McGloin (14) during the fourth quarter of an NFL preseason football game in Oakland, Calif., Friday, Aug. 23, 2013. The Bears won 34-26. (AP Photo/Marcio Jose Sanchez)