Interim head coach Brian Arians had a great deal of success in Pittsburgh with running back Mewelde Moore, and it was that success that likely prompted Arians' new team, the Colts, to sign Moore during the offseason. However, with Vick Ballard coming around and Donald Brown back from injury, Moore became expendable.

On Monday, the Colts released Moore and defensive tackle Antonio Dixon.

Moore only had 14 yards on 9 rushes with the Colts. He also had 4 receptions for 36 yards and one touchdown. It's possible Moore could be brought back at some point this season.

With the two open roster spots, Indianapolis signed FB Robert Hughes and CB Marshay Green to active roster from the practice squad. Signing Green suggests that Vontae Davis' knee injury will keep him out for an undetermined period of time. Davis was hurt early in Sunday's victory over the Titans.

Per Bruce Arians on his Monday call-in radio show, the Colts expect to have defensive end Fili Moala and corner Darius Butler back for Sunday's game against the Dolphins. It is also possible that linebacker Robert Mathis could return soon too. Mathis has been out with a knee injury since Week 5.