Bears linebacker Brian Urlacher was not on the field for the first 15 minutes of practice Friday. Only the first 15 minutes are open to the media.
The coaching staff was unavailable to immediately discuss Urlacher's absence. Coach Lovie Smith was expected to address the situation after practice. With Urlacher out, Jamar Williams filled in at middle linebacker during early drills.
Weak-side linebacker Lance Briggs was excused from practice last Friday for personal reasons.
Receiver Muhsin Muhammad was held out of practice Friday, while rookie tight Greg Olsen resumed his comeback from a knee sprain.
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