"According to our scouts and coaches he's an instinctive player, and we feel he can come in here and compete," Panthers general manager Marty Hurney said.
Harris will likely step in right away as the starter at strong safety next to veteran Mike Minter. Nate Salley had been working with the first team until having a right knee injury in practice Wednesday. Salley sat out practice Thursday and is listed day to day.
"I think we're fortunate the Bears have a real surplus at that position," Hurney said. "Chris is a guy that we feel can come in here, compete and help us."
Harris, who played at Louisiana-Monroe, was Chicago's sixth-round pick in 2005.