The move was announced Thursday.
Clausen appeared in 13 games for Carolina from 2010 to 2013 after starring at Notre Dame. He made 10 starts as a rookie and threw for 1,558 yards with three touchdowns and nine interceptions in a 2-14 season. The Panthers drafted Cam Newton the following April.
Clausen was waived/injured last August.
Besides signing Clausen, the Bears waived linebacker Lawrence Wilson.
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