The Sleepytime Gorilla Museum's initial writings and first shows were with drummer David Shamrock. Drummer Frank Grau, who co-released the first album and managed the band until recently, instigated touring in 2001.
Currently David Shamrock is playing with Thin Pillow, a dense, multi-layered exploration of anxiety, melancholy, anticipation, exuberance, frustration, and joyfulness.
David Shamrock also drummed for the most recent Thinking Plague release, "A History of Madness".