INDIANAPOLIS (AP) -The Indianapolis Colts suddenly have some serious holes in the secondary: Cornerback Marlin Jackson and strong safety Bob Sanders are both gone for the season.

The team said Friday that Jackson (left knee) and Sanders (left elbow) have both been placed on injured reserve.

Sanders will undergo surgery for a torn biceps.

Veteran cornerback Kelvin Hayden is also expected to be sidelined for the next three to four weeks with a knee sprain.

The Colts host Houston on Sunday.