LAKE FOREST, Ill. -- Bears middle linebacker Brian Urlacher remains sidelined with a left calf strain, casting doubt on his availability for Saturday's game against Arizona.
Urlacher has not practiced for three straight days after suffering the injury early in the first quarter of Saturday's contest versus Oakland.
"He's been around a long time and we love him and all that, but right now he's not ready to go," Bears head coach Lovie Smith said. "But in time, he will be [ready]. Nothing serious with him, but we never put any players out there until they feel like they can play up to their potential. We're not quite there right now, but we'll get there in time."
Right guard Lance Louis, who's been bothered in recent weeks by a sore ankle, was participating on individual offensive line drills during the portion of practice open to the media. Safety Josh Bullocks also returned to practice after missing time due to a quad injury, while rookie Major Wright continues to practice without contact.
Also, tight end Desmond Clark began working with Bears running backs coach Tim Spencer this week. Although officially labeled an "H-Back," the Bears have begun to use Clark more like a fullback in the past week.
Jeff Dickerson covers the Bears for ESPNChicago.com and ESPN 1000.