Complex sentence: He had a number of English versions of Japanese anime series originally auditioned for ADV Films, while working on Blue Seed, but it would be years later that he got his start on Gantz.
Split into simpler sentences: He had a number of English versions of Japanese anime series. Ayres had originally auditioned for ADV Films, while working on Blue Seed, but it would be years later that he got his start on Gantz.