Bears wide receiver Brandon Marshall left practice Thursday with back tightness, coach Marc Trestman said. "Just to be cautious, we pulled him out of practice," Trestman said. "He walked around, moved around. As I said, just to be cautious." Marshall experienced the discomfort after practice was halfway complete. Marshall met with reporters Thursday before Trestman disclosed the injury. Marshall did not address it, but he was not noticeably laboring. Source:Chicago Tribune