Chicago Bears linebacker Brian Urlacher is recovering from arthroscopic knee surgery, but is expected to be ready for the season-opener in September.  According to the team's website, Urlacher had the procedure to help reduce swelling in his left knee.  He suffered sprained ligaments in the knee in last season's finale against Minnesota.  Urlacher said Sunday he intended to be ready for the opener against Indianapolis despite missing about a week of workouts for what he and the team said were personal reasons.