"He hasn't missed a rep all camp,'' Smith said about Jones. "We just felt this was the perfect time to keep him out.
"Next week is our game plan week as far as playing our starters the majority of the game so we wanted to try to put ourselves in the best position for that.''
Adrian Peterson didn't look like a bad alternative to Jones or Benson Saturday, rushing for 60 yards on 14 carries, including a touchdown in the second quarter.
Linebacker Brian Urlacher had an unsportsmanlike conduct penalty for a late hit on an incomplete pass. The penalty led to the only touchdown by the Colts.
"It was a judgment call,'' Urlacher said. "I didn't know he wouldn't catch the ball so I was trying to get the ball out of his hands.''
The teams combined for 184 yards in penalties on 24 flags. The Bears had 95 yards on 12 flags and the Colts had 89 yards on 12.
"Disappointing things ... the penalties and some of the mistakes,'' Smith said. "But that's what preseason is about and we'll just try to improve on that next week.''
Safety Bobby Gray, locked now in a battle for playing time and possibly even a roster spot, with impressive rookie Chris Harris, suffered a sprained left knee and was taken from the field on a cart in the second quarter. X-rays were negative. . . . Rookie linebacker Rod Wilson suffered a bruised left knee on a punt and limped off the field. Coach Lovie Smith said the X-rays were negative.
Guard Ruben Brown left the game with a sore elbow but isn't wasn't serious. Linebacker Marcus Reese saw his first action of preseason and aggravated a sore shoulder that had sidelined him early in camp.