Complex sentence: Skip is probably best known for his work as a bass player and songwriter with The Byrds from 1970 to 1973 with whom he recorded three albums and toured extensively, many of his contributions co-written with long time collaborator and songwriter Kim Fowley.
Split into simpler sentences: Skip is probably best known for his work as bass player and songwriter with The Byrds from 1970 to 1973. Many of his songwriting contributions were co-written with long time collaborator and songwriter Kim Fowley.