Conversation so far:
What was Michael Anothony's role in Van Halen?
Anthony was the bassist and background vocalist for Van Halen.
What caused Michael Anthony's role for Van Halen to start diminishing?
Was Michael Anthony actually fired from Van Halen?
Despite rumors, Michael Anthony continued working with the band. These rumors persisted until his final departure after the 2004 reunion tour.

Question: WHen did he leave the band?
Self-contained rewrite: When did Michael Anothony leave Van Halen?