Conversation so far:
When did the Guttermouth lineup change?
The following year found Guttermouth returning home to California and experiencing a lineup change. Clint Weinrich married in the spring of 1995
How did the Guttermouth lineup change in 1995?
To fill in for Clint Weinrich on a European tour Guttermouth recruited Steve Stever Rapp, a college friend of Nunn's who was playing in a band called The Grabbers.
What else changed in the Guttermouth lineup besides recruiting Steve Stever Rapp?
Rapp left Guttermouth in 1999, at which point Nunn moved from drums to bass and new drummer William Ty Smith was brought in.

Question: What did Rapp do in the band?
Self-contained rewrite: What did Rapp do in the band Guttermouth?