The Colts just issued their weekly Tuesday injury update:
"Defensive back Bob Sanders (biceps) and wide receiver Austin Collie will be out this week against San Diego. Collie will be held out as a precautionary measure. After being cleared medically to participate at New England, he encountered symptoms from his previous injury at Philadelphia (concussion), though there was no recurrence at New England. Running back Joseph Addai will progress to practice this week for conditioning purposes. Addai will participate in non-contact drills only, and a timetable for a full return to action is uncertain. The club has placed defensive back Chip Vaughn (ankle) on injured reserve, and defensive back Al Afalava has been signed as a free agent."