Spitz reunited with Anthrax for a classic lineup reunion tour in 2005, appearing on the tour DVD Alive 2. He left the band again in 2007 to return to his watchmaking career. In 2010 Spitz formed a new Christian rock/metal band Red Lamb, which also included singer Don Chaffin from Voices of Extreme and keyboardist Chris Vrenna. Dave Mustaine was an early member but ultimately stepped back into a songwriting role with Spitz. Mustaine and Spitz wrote the song "Puzzle Box" which was claimed to be the first heavy metal song to deal with autism; the song's video featured Bob and Suzanne Wright, co-founders of Autism Speaks. In 2017, Spitz formed another Christian metal band with former Journey drummer Deen Castronovo.
