Forte suffered the injury during last Thursday’s 23-10 loss at Green Bay. He carried the ball seven times for 31 yards before exiting.
"It’s just playing football,’’ Bush said. "It’s a role I’ve been in. I’m used to it. I don’t get too excited about it. I just make sure I’m doing my job."
When the teams last met in 2009, the Bears ran the ball 38 times (120 yards) in a 17-9 win at Soldier field. Quaterback Jay Cutler threw just 17 passes that day, completing eight.
The Bears somewhat abandoned the running game last week against the Packers, contributing to their downfall. Getting back to the running game would appear to be shrewd move against a Rams team that allowed 129.5 rushing yards per game in two contests.
Bush’s single-game career-high is 30 carries. He is known more as a bruiser but has the ability to bounce it outside.
"Whatever the defense gives me is what I take,’’ Bush said. "If the corner is open, I’m going to take it. If it ain’t, I’m going to go where I’m supposed to go. I’m more like a system guy. You know I’m going to be consistent. I’m not going to bounce it if there’s nothing out there.’’
Armando Allen ran with the second team at practice this week and could back up Bush on Sunday. Kahlil Bell, who re-joined the team last weekend following Forte’s injury, could be in the backfield mix as well. Bell had 11 carries for 35 yards in the ’09 win over the Rams.
In St. Louis, starting running back Steven Jackson is "questionable’’ with a groin injury. Jackson was held out of practice Wednesday and Thursday then was limited Friday.