Cotto joined the station as a street reporter and fill-in anchor, later moving to middays, hosting the WBBM noon business hour.
Cassidy’s career began in 1969 at the now-defunct WEXI in Arlington Heights, Illinois.
Mann has been with WBBM since 1995 when she joined the station as a news reporter.
Miller has been employed at the station for 38 years. He’ll reportedly return for occasional fill-in work and special projects.
Jay Howell, who supervised KCBS and KCAL in Los Angeles, and Derek Dalton, head of WBBM in Chicago, have departed their positions with the network.