Complex sentence: Lonsberry was later fired from WHAM-AM for the remarks (but not KNRS, both Clear Channel radio stations), underwent sensitivity training and was rehired the following year after WHAM ratings in his time slot plunged.
Split into simpler sentences: Lonsberry was later fired from WHAM-AM for the remarks (but not KNRS, both Clear Channel radio stations). He was rehired the following year after completing sensitivity training when WHAM ratings in his time slot plunged.