The Bears have waived guard Vince Vance and injured linebacker Matt Mayberry.
The moves came in response to the team signing backup quarterback Matt Gutierrez and defensive back Aaron Webster earlier in the day.
Gutierrez will wear No. 8 and will practice with the team for the first time this afternoon. How quickly the former Patriots and Chiefs backup can pick up Mike Martz's offense will likely determine whether he sees action in Saturday night's exhibition game against the Raiders at Soldier Field.
"The coach has had a lot of success with the offense," Gutierrez said. "It's for a reason. I'm just excited to be here and try to learn it."
Webster's signing is a result of injuries to safeties Craig Steltz (ankle) and rookie Major Wright (finger). The former Cincinnati standout was signed by the Texans as an undrafted free agent and later released.