Updating **a look at the Colts' defensive injuries** from earlier this week, the team made **a few announcements** yesterday. Cornerback Marlin Jackson, who hadn't played since Oct. 4, was placed on injured reserve with a left knee injury. Jackson was hoping to return to face the Texans but suffered the injury during a non-contact portion of practice on Wednesday.
Safety Bob Sanders, meanwhile, visited with Dr. James Andrews on Thursday to "gather additional information on the left elbow injury he suffered last Sunday against San Francisco," according to the team. Sanders missed the first five games of the 2009 season with a knee injury but had played in the last two games. The 2007 NFL Defensive Player of the Year had an interception against the 49ers last week.
The Colts also announced that wide receiver Anthony Gonzalez underwent arthroscopic right knee surgery on Thursday. No timetable has been set for his return.
