Terms of the deals weren't disclosed.
Austin signed with the Cowboys as an undrafted free agent in 2006 and had a 93-yard kickoff return for a touchdown as a rookie. He was expected to play a bigger role as a wide receiver last season, but injuries limited him to 13 catches for 278 yards and three touchdowns.
Coleman and Hannah have spent the majority of the past two seasons on the Cowboys' practice squad after signing as undrafted rookie free agents.
Copyright 2009 by The Associated Press