Conversation so far:
What happened to Duff McKagan in 1979?
In 1979, at the age of 15, Duff McKagan formed the punk band the Vains, in which he played bass; they released the single School Jerks in 1980.
What role did Duff McKagan have in the Vains?
Duff McKagan played bass in the Vains.
what else happened Duff McKagan in the following years after forming the punk band the Vains as bassist?
In 1980, McKagan joined the pop-punk band the Fastbacks as their drummer.
Were the band the Fastbacks popular?

Question: Was he in other bands?
Self-contained rewrite: Was Duff McKagan in other bands besides the Vains, and the Fastbacks?