Conversation so far:
What projects did Michael Anthony do with Van Halen?
In 1974, Eddie Van Halen, Alex Van Halen, David Lee Roth and Anthony became known as Van Halen
What was the first album Michael Anthony recorded with Van Halen?
Van Halen were signed to Warner Brothers in 1977 and released their self-titled debut album on February 8, 1978.

Question: Why did he have less involvement with Van Halen III?
Self-contained rewrite: Why did Michael Anthony have less involvement with Van Halen III compared to their earlier work?