Chicago Bears quarterback Jay Cutler (6) warms up before a preseason NFL football game against the San Diego Chargers, Thursday, Aug. 15, 2013, in Chicago. (AP Photo/Jim Prisching)

San Diego Chargers quarterback Philip Rivers (17) and Chicago Bears wide receiver Brandon Marshall (15) greet each other before a preseason NFL football game, Thursday, Aug. 15, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

Chicago Bears head coach Marc Trestman walks around the field before a preseason NFL football game against the San Diego Chargers, Thursday, Aug. 15, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

San Diego Chargers quarterback Philip Rivers (17) warms up before a preseason NFL football game against the Chicago Bears, Thursday, Aug. 15, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

Bears head coach Marc Trestman stands on the sidelines during first-quarter action.

Chicago Bears tight end Martellus Bennett (83) gets stopped by the San Diego Chargers defense on his kick off return during the first half of the preseason NFL football game, Thursday, Aug. 15, 2013, in Chicago. (AP Photo/Jim Prisching)

Chicago Bears running back Matt Forte (22) runs against San Diego Chargers defense during the first half of the preseason NFL football game, Thursday, Aug. 15, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

Chicago Bears running back Matt Forte (22) runs against San Diego Chargers defense during the first half of the preseason NFL football game, Thursday, Aug. 15, 2013, in Chicago.

On third and one, Bears running back Matt Forte breaks off a 58-yard run up the left side.

Bears safety Chris Conte makes a diving interception after CB Tim Jennings stepped in front of receiver Kennan Allen.

Bears safety Chris Conte looks to pick up additional yardage following an interception but is ultimately ruled down by contact.

Receiver Brandon Marshall celebrates after connecting with quarterback Jay Cutler on a seven-yard touchdown during the first quarter.

Chicago Bears wide receiver Brandon Marshall (15) celebrates his touchdown reception against San Diego Chargers with his teammates during the first half of the preseason NFL football game, Thursday, Aug. 15, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

Chicago Bears quarterback Jay Cutler (6) looks for a receiver during the first half of the preseason NFL football game against the San Diego Chargers, Thursday, Aug. 15, 2013, in Chicago. (AP Photo/Jim Prisching)

Bears running back Matt Forte manages to pick up a five-yard gain after shedding a diving tackle from #92 Cam Thomas.

15 Brandon Marshall immediately takes down Chargers linebacker Donald Butler following an interception thrown from Bears QB Jay Cutler.

Chicago Bears defensive end Corey Wootton (98) sacks San Diego Chargers quarterback Philip Rivers (17) during the first half of a preseason NFL football game, Thursday, Aug. 15, 2013, in Chicago. (AP Photo/Jim Prisching)

Chicago Bears defensive end Corey Wootton (98) celebrates after sacking San Diego Chargers quarterback Philip Rivers (17) during the first half of the preseason NFL football game, Thursday, Aug. 15, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

98 Corey Wootton celebrates with #33 Charles Tillman after bursting inside to sack Chargers QB Phillip Rivers for a nine-yard loss.

Chicago Bears defensive end Shea McClellin (99) sacks San Diego Chargers quarterback Philip Rivers (17) during the first half of the preseason NFL football game, Thursday, Aug. 15, 2013, in Chicago. Rivers loses the ball which was recovered by Bears safety Major Wright on the play. (AP Photo/Charles Rex Arbogast)

Chicago Bears defensive end Shea McClellin (99) sacks San Diego Chargers quarterback Philip Rivers (17) during the first half of the preseason NFL football game, Thursday, Aug. 15, 2013, in Chicago. Rivers loses the ball which was recovered by Bears safety Major Wright on the play. (AP Photo/Charles Rex Arbogast)

Chicago Bears running back Matt Forte (22) rolls into the end zone for a touchdown against San Diego Chargers nose tackle Cam Thomas (92) during the first half of the preseason NFL football game, Thursday, Aug. 15, 2013, in Chicago.

Chicago Bears running back Matt Forte (22) rolls into the end zone for a touchdown against San Diego Chargers nose tackle Cam Thomas (92) during the first half of the preseason NFL football game, Thursday, Aug. 15, 2013, in Chicago. (AP Photo/Jim Prisching)

22 Matt Forte celebrates with #75 Kyle Long and #68 Matt Slauson after bursting into the end zone from three yards out, giving the Bears a 14-0 lead at the end of the first quarter.

93 Nate Collins delivers a punshing tackle on Chargers QB Phillip Rivers resulting in a 6-yard sack.

Chicago Bears strong safety Major Wright (21) celebrates after his fumble recovery against the San Diego Chargers during the first half of the preseason NFL football game, Thursday, Aug. 15, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

San Diego Chargers inside linebacker Donald Butler (56) intercepts a pass intended for Chicago Bears wide receiver Brandon Marshall (15) during the first half of the preseason NFL football game, Thursday, Aug. 15, 2013, in Chicago. (AP Photo/Jim Prisching)

San Diego Chargers running back Fozzy Whittaker (34) runs against Chicago Bears outside linebacker Lance Briggs (55) during the first half of the preseason NFL football game, Thursday, Aug. 15, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

78 Cory Brandon quickly shoves off Chargers defensive end Damik Scafe to give the Bears an open running lane.

Chicago Bears running back Michael Bush (29) runs for a touchdown during the second half of the preseason NFL football game against the San Diego Chargers, Thursday, Aug. 15, 2013, in Chicago. (AP Photo/Jim Prisching)

Receiver Eric Weems hauls in a 10-yard grab to put the Bears in position to pick up an easy first down.

Bears quarterback Josh McCown calls out the offensive adjustments during third-quarter action.

12 Josh McCown looks to rifle a quick pass to Bears receiver Devin Aromashodu on third and short.

Chicago Bears running back Michael Bush (29) celebrates his touchdown run with quarterback Josh McCown (12) during the second half of the preseason NFL football game against the San Diego Chargers, Thursday, Aug. 15, 2013, in Chicago. (AP Photo/Jim Prisching)

71 Aston Whiteside levels Chargers running back Fozzy Whittaker resulting in a five-yard loss.

92 Stephen Paea puts himself into position to stop the run during the third quarter.

38 Zack Bowman, #60 Khaseem Greene and #37Anthony Walters team up to smother Chargers running back Fozzy Whittaker in the backfield.

81 Terrence Toliver stops kick returner Richard Goodman for no gain deep into Chargers territory.

The Bears took over at the San Diego 20 yard line after linebacker J.T. Thomas stormed up the middle to block Richard Kent's punt.

21 Major Wright celebrates with #50 James Anderson after recovering a fumble in that was forced by Bears defensive end Shea McClellin.

Kyle Long teamed up with fellow rookie lineman Jordan Mills to pave the way for Matt Forte's 74 yards and one touchdown on eight carries. Together they helped the Bears offense convert 67 percent of their third downs.

The Bears defeated the San Diego Chargers 33-28 to improve to 1-1 in the preseason and get the first win of the Marc Trestman era.

Chicago Bears head coach Marc Trestman and San Diego Chargers head coach Mike McCoy greet each other after the preseason NFL football game, Thursday, Aug. 15, 2013, in Chicago. The Bears won 33-28. (AP Photo/Charles Rex Arbogast)

Chicago Bears defensive end Julius Peppers, left, talks to San Diego Chargers quarterback Philip Rivers (17) after the preseason NFL football game, Thursday, Aug. 15, 2013, in Chicago. The Bears won 33-28. (AP Photo/Charles Rex Arbogast)