Complex sentence: Loder joined MTV in 1987 as the host of their flagship music news program, "The Week in Rock", and it was later expanded and renamed to "MTV News" in which he was an anchor and correspondent.
Split into simpler sentences: Loder joined MTV in 1987 as the host of their flagship music news program, "The Week in Rock". It was later expanded and renamed to "MTV News" in which he was an anchor and correspondent.