The Colts signed DT Daniel Muir, who played with the team from 2008-2010, and cut OT Mike Tepper.
Muir, who spent training camp with the Rams, was a free agent. Last season with Indy he started all 14 games he played and recorded 38 tackles. He had 52 tackles in 2009.
Tepper was signed from the practice squad last week and played as an injury replacement in last Monday night's loss to the Buccaneers.