Complex sentence: Mark Bolger, currently at WCZX (MIX 97FM), joined K104 as the evening DJ nicknamed as "The Bolge" from 1985 to 1988, when he handled the morning drive as "Mark Bolger in the Morning on K104" until 1996.
Split into simpler sentences: Mark Bolger, currently at WCZX (MIX 97FM), joined K104. He then handled the K-104 morning drive as "Mark Bolger in the Morning on K104" until 1996.