Entercom System: As reported earlier via Breaking News, Entercom KSON/San Diego OM/PD Kevin Callahan has added programming responsibility for sister KFRG/Riverside, filling the vacancy created by the departure of Scott Ward (CAT 6/5). Callahan retains his duties for the five-station San Diego cluster and will now handle programming oversight for all of Entercom's Southern California properties. Prior to joining Entercom in 2010, Callahan served as Pamal RVP/Programming for stations in New York, Vermont and Florida. Reach him here.