The Indianapolis Colts placed S Melvin Bullitt on injured reserve on Tuesday, two days after he injured his shoulder in a loss at Jacksonville.

Bullitt will undergo surgery. He had been the replacement for S Bob Sanders, who has been out indefinitely since he tore a biceps muscle in Week 1.

It's the latest injury blow for the Colts, who will also be without WR Anthony Gonzalez and LB Kavell Conner this week.

The Colts also signed DBs Mike Newton and Aaron Francisco on Tuesday.

-- Sean Leahy