Callaghan Leaves iHeartMedia: iHeartMedia/Northern Colorado SVP/Programming Mark Callaghan has resigned to focus on real estate sales. His last day is Friday (4/3). Callaghan joined as OM of the seven-station cluster, and PD of Country KXBG/Fort Collins, KOLZ/Cheyenne, WY and Classic Country KIIX-AM/Fort Collins a little more than a year ago (CAT 12/2/13). His prior stops include Entercom AC KOSI/Denver and 16 years at Townsquare/Fort Collins. Reach him until Friday here. No word on plans to fill his bathtub.