Complex sentence: Cunningham's first regular show on the station was at night, generally from 9:00 p.m. until midnight; this meant that his show was not heard during the summer months, when WLW broadcasts Cincinnati Reds baseball games.
Split into simpler sentences: Cunningham's first regular show on the station was at night, generally from 9:00 p.m. until midnight. His show was not heard during the summer months, when WLW broadcasts Cincinnati Reds baseball games.