The Colts relinquished their rights to five restricted free agents, including RB Mike Hart, according to multiple reports.
Hart, S Jamie Silva, TEs Tom Santi and Gijon Robinson and DB Mike Richardson are now all unrestricted free agents.
Hart played in seven games last season and rushed for 185 yards and a score. Silva, a special-teams standout, played in 25 games in his first two seasons in Indy but did not see any action in 2010 because of injury.
The Colts drafted RB Delone Carter, who is expected to fill Hart's role.