The Packers placed tight end Andrew Quarless (knee) and safety Sean Richardson (back) on the season-ending injured reserve list on Saturday, the team announced.
To replace them on the 53-man roster, the Packers signed running back DuJuan Harris and receiver Jeremy Ross off their practice squad.
Harris (5-8, 203) is a first-year player from Troy University who was signed to the practice squad on Oct. 24. Harris played in five games for Jacksonville in 2011.
Ross (6-0, 215) is a first-year player from the University of California. He was signed to the Packers' practice squad Oct. 17. He was on the Indianapolis practice squad for 13 games in 2011.