The Bears signed guard Herman Johnson to the active roster and linebacker Marcus Buggs and receiver Jeff Moturi to the practice squad on Tuesday.
They waived defensive end Barry Turner and terminated the practice squad contracts of defensive end Ervin Baldwin, former Homewood-Flossmoor and Bowling Green receiver Freddie Barnes and tackle James Marten.
Johnson was a fifth-round pick of the Cardinals in 2009. The former LSU offensive lineman spent last season on the Cardinals active roster but was inactive for all 16 games. He had been on Arizona's practice squad during the first 13 weeks of this season.
Buggs was on the Bears' practice squad for the first six weeks of this season. Moturi was originally signed by the Packers as an undrafted free agent out of UTEP earlier this year. He also spent time on the Colts' practice squad.
Turner made his debut in a loss to the Redskins earlier this season and had one tackle.