Conversation so far:
What changes were in store for REO Speedwagon during the 90's?
By the late 1980s, the band REO Speedwagon's popularity was starting to decline.
How did REO Speedwagon's popularity starting to decline affect the group?
REO Speedwagon's Original drummer Alan Gratzer left in September 1988 after he decided to retire from music to open a restaurant.

Question: Were there any other changes?
Self-contained rewrite: Were there any other changes to the band besides that original drummer Alan Gratzer left in September 1988 after he decided to retire from music to open a restaurant?