Washington Redskins quarterback Robert Griffin III warms up before an NFL preseason football game against the Chicago Bears in Chicago, Saturday, Aug. 18, 2012. (AP Photo/Charles Rex Arbogast)

Washington Redskins quarterback Robert Griffin III signs an autograph for 7-year-old Charlie Specht, of Elmhurst, Ill., before an NFL preseason football game against the Chicago Bears in Chicago, Saturday, Aug. 18, 2012. (AP Photo/Charles Rex Arbogast)

Washington Redskins quarterback Rex Grossman (8) chats with Chicago Bears wide receiver Devin Hester (23) before an NFL preseason football game in Chicago, Saturday, Aug. 18, 2012. (AP Photo/Charles Rex Arbogast)

Washington Redskins running back Evan Royster (35) runs between Chicago Bears defenders Chris Conte (47) and D.J. Moore (30) during the first half of an NFL preseason football game in Chicago, Saturday, Aug. 18, 2012. (AP Photo/Nam Y. Huh)

Washington Redskins quarterback Robert Griffin III (10) get pressure from Chicago Bears defensive end Julius Peppers (90) as he releases a pass during the first half of an NFL preseason football game in Chicago, Saturday, Aug. 18, 2012. (AP Photo/Nam Y. Huh)

Washington Redskins quarterback Robert Griffin III (10) hands the ball off to running back Alfred Morris in the first half of an NFL preseason football game against the Chicago Bears in Chicago, Saturday, Aug. 18, 2012. (AP Photo/Charles Rex Arbogast)

Chicago Bears defensive end Julius Peppers warms up before an NFL preseason football game against the Washington Redskins in Chicago, Saturday, Aug. 18, 2012. (AP Photo/Nam Y. Huh)

Washington Redskins quarterback Robert Griffin III scrambles against the Chicago Bears in the first half of an NFL preseason football game in Chicago, Saturday, Aug. 18, 2012. (AP Photo/Charles Rex Arbogast)

Chicago Bears quarterback Jay Cutler (6) passes against the Washington Redskins in the first half an NFL preseason football game in Chicago, Saturday, Aug. 18, 2012. (AP Photo/Nam Y. Huh)

Washington Redskins quarterback Robert Griffin III looks for a receiver against the Chicago Bears in the first half of an NFL preseason football game in Chicago, Saturday, Aug. 18, 2012. (AP Photo/Charles Rex Arbogast)

Washington Redskins running back Alfred Morris is tackled by Chicago Bears defensive end Israel Idonije (71) during the first half of an NFL preseason football game in Chicago, Saturday, Aug. 18, 2012. (AP Photo/Nam Y. Huh)

Chicago Bears running back Michael Bush (29) rushes 1 yard for a touchdown in the first half of an NFL preseason football game against the Washington Redskins in Chicago, Saturday, Aug. 18, 2012. (AP Photo/Nam Y. Huh)

Chicago Bears wide receiver Brandon Marshall (15) tries to elude a tackle by Washington Redskins defensive back David Jones (25) in the first half of an NFL preseason football game in Chicago, Saturday, Aug. 18, 2012. (AP Photo/Nam Y. Huh)

Washington Redskins running back Alfred Morris (46) is tackled by Chicago Bears linebacker Geno Hayes (91) and defensive end Henry Melton, bottom, during the first half of an NFL preseason football game in Chicago, Saturday, Aug. 18, 2012. (AP Photo/Nam Y. Huh)

Chicago Bears quarterback Jay Cutler (6) is tackled by Washington Redskins nose tackle Adam Carriker (94) in the first half of a preseason NFL football game in Chicago, Saturday, Aug. 18, 2012. (AP Photo/Nam Y. Huh)

Chicago Bears quarterback Jay Cutler smiles as he talks with quarterbacks coach Jeremy Bates during the first half of an NFL preseason football game against the Washington Redskins in Chicago, Saturday, Aug. 18, 2012. (AP Photo/Nam Y. Huh)

Chicago Bears running back Michael Bush (29) celebrates his one-yard touchdown run with quarterback Jay Cutler (6) and wide receiver Brandon Marshall (15) in the first half of a preseason NFL football game against the Washington Redskins in Chicago, Saturday, Aug. 18, 2012. (AP Photo/Nam Y. Huh)

Chicago Bears running back Michael Bush (29) celebrates with quarterback Jay Cutler (6) after Bush scored on a one-yard run against the Washington Redskins in the first half of a NFL preseason football game in Chicago, Saturday, Aug. 18, 2012. (AP Photo/Nam Y. Huh)

Chicago Bears wide receiver Brandon Marshall (15) reacts to a play with tight end Kellen Davis (87) in the first half of an NFL preseason football game against the Washington Redskins in Chicago, Saturday, Aug. 18, 2012. (AP Photo/Nam Y. Huh)

Washington Redskins quarterback Robert Griffin III looks for a receiver in the first half of an NFL preseason football game against the Chicago Bears in Chicago, Saturday, Aug. 18, 2012. (AP Photo/Charles Rex Arbogast)

Chicago Bears wide receiver Brandon Marshall makes a 41-yard reception from quarterback Jay Cutler (6) in the first half of an NFL preseason football game against the Washington Redskins in Chicago, Saturday, Aug. 18, 2012. (AP Photo/Charles Rex Arbogast)

Washington Redskins running back Evan Royster (35) is tackled by Chicago Bears defenders Chris Conte (47), Nick Roach (53) and Henry Melton (69 ) during the first half of an NFL preseason football game in Chicago, Saturday, Aug. 18, 2012. (AP Photo/Nam Y. Huh)

Aug 18, 2012; Chicago, IL, USA; Washington Redskins quarterback Robert Griffin III (10) is pursued by Chicago Bears linebacker Nick Roach (53) during the second quarter at Soldier Field. Mandatory Credit: Dennis Wierzbicki-US PRESSWIRE

Aug 18, 2012; Chicago, IL, USA; Chicago Bears wide receiver Brandon Marshall (15) is unable to catch a pass while defended by Washington Redskins cornerback Josh Wilson (26) during the second quarter at Soldier Field. Mandatory Credit: Dennis Wierzbicki-US PRESSWIRE

Aug 18, 2012; Chicago, IL, USA; Chicago Bears running back Michael Bush (29) runs for a touchdown during the second quarter against the Washington Redskins at Soldier Field. Mandatory Credit: Dennis Wierzbicki-US PRESSWIRE

Aug 18, 2012; Chicago, IL, USA; Chicago Bears tight end Kyle Adams (86) escapes the grasp of Washington Redskins defensive back Tanard Jackson (34) during the second quarter at Soldier Field. Mandatory Credit: Dennis Wierzbicki-US PRESSWIRE

August 18, 2012; Chicago, IL, USA; Washington Redskins quarterback Robert Griffin III (10) hands off to running back Alfred Morris (46) against the Chicago Bears during the second quarter at Soldier Field. Mandatory Credit: Rob Grabowski-US PRESSWIRE

Aug 18, 2012; Chicago, IL, USA; Chicago Bears wide receiver Eric Weems (14) is tackled by Washington Redskins linebacker D.J. Holt (57) and safety Madieu Williams (41) during the second quarter at Soldier Field. Mandatory Credit: Dennis Wierzbicki-US PRESSWIRE

Aug 18, 2012; Chicago, IL, USA; Chicago Bears wide receiver Eric Weems (14) is tackled by Washington Redskins linebacker D.J. Holt (57) and safety Madieu Williams (41) during the second quarter at Soldier Field. Mandatory Credit: Dennis Wierzbicki-US PRESSWIRE

August 18, 2012; Chicago, IL, USA; Chicago Bears wide receiver Alshon Jeffery (17) is defended by Washington Redskins defensive back Cedric Griffin (20) during the first quarter at Soldier Field. Mandatory Credit: Rob Grabowski-US PRESSWIRE

Aug 18, 2012; Chicago, IL, USA; Chicago Bears running back Michael Bush (29) runs for a touchdown during the first quarter against the Washington Redskins at Soldier Field. Mandatory Credit: Dennis Wierzbicki-US PRESSWIRE

Aug 18, 2012; Chicago, IL, USA; Washington Redskins running back Evan Royster (35) runs with the ball as Chicago Bears safety Chris Conte (47) attempts a tackle during the first quarter at Soldier Field. Mandatory Credit: Dennis Wierzbicki-US PRESSWIRE

Washington Redskins quarterback Robert Griffin III (10) is tackled by Chicago Bears defensive end Israel Idonije (71) and defensive tackle Matt Toeaina (75) during the first half of an NFL preseason football game in Chicago, Saturday, Aug. 18, 2012. At left is Redskins offensive tackle Tyler Polumbus. (AP Photo/Charles Rex Arbogast)

Washington Redskins quarterback Robert Griffin III (10) tries to stay in bounds as he is pursued by Chicago Bears linebacker Nick Roach (53) during the first half of an NFL preseason football game in Chicago, Saturday, Aug. 18, 2012. (AP Photo/Charles Rex Arbogast)

Washington Redskins running back Evan Royster (35) eludes a tackle attempt by a Chicago Bears defender in the first half of an NFL preseason football game in Chicago, Saturday, Aug. 18, 2012. (AP Photo/Nam Y. Huh)

Aug 18, 2012; Chicago, IL, USA; Washington Redskins quarterback Robert Griffin III (10) runs out of the grasp of Chicago Bears safety Major Wright (21) during the second quarter at Soldier Field. Mandatory Credit: Dennis Wierzbicki-US PRESSWIRE

Aug 18, 2012; Chicago, IL, USA; Chicago Bears running back Michael Bush (29) runs for a touchdown during the first quarter against the Washington Redskins at Soldier Field. Mandatory Credit: Dennis Wierzbicki-US PRESSWIRE

Washington Redskins wide receiver Aldrick Robinson (11) heads to the end zone for a touchdown after making a reception in the second half of an NFL preseason football game against the Chicago Bears in Chicago, Saturday, Aug. 18, 2012. The Bears won 33-31. (AP Photo/Charles Rex Arbogast)

Chicago Bears defensive end Julius Peppers (90) and Washington Redskins quarterback Robert Griffin III chat after an NFL preseason football game in Chicago, Saturday, Aug. 18, 2012. The Bears won 33-31. (AP Photo/Charles Rex Arbogast)

Chicago Bears kicker Robbie Gould (9) and holder Ryan Quigley (1) watch Gould's field goal that gave the Bears a 33-31 win over the Washington Redskins in an NFL preseason football game in Chicago, Saturday, Aug. 18, 2012. At left is Redskins' Richard Crawford. (AP Photo/Nam Y. Huh)

Teammates congratulate Chicago Bears kicker Robbie Gould (9) after his field goal in the final minute of the Bears' 33-31 win over the Washington Redskins in an NFL preseason football game in Chicago, Saturday, Aug. 18, 2012. (AP Photo/Nam Y. Huh)

Chicago Bears' Robbie Gould (9) kicks a field goal to give the Bears a 33-31 win over the Washington Redskins in an NFL preseason football game in Chicago, Saturday, Aug. 18, 2012. Holding is Ryan Quigley. (AP Photo/Nam Y. Huh)

Chicago Bears free safety Brandon Hardin (35) tackles Washington Redskins tight end Logan Paulsen (82) during the second half of an NFL preseason football game in Chicago, Saturday, Aug. 18, 2012. Hardin was injured on the play and was taken off the field on a stretcher. (AP Photo/Charles Rex Arbogast)