====Bass====
*[[Pino Palladino]] (2013) (Tension Tour only)
*Josh Eustis (2013) (Festivals 2013 Tour only; also occasionally handled keyboards, backing vocals, saxophone)
*[[Eric Avery]] (2013) (Never made it to the road, replaced by Eustis and Palladino)
*[[Rich Fownes]] (2008) (Never made it to the road, replaced by Meldal-Johnsen)
*[[Justin Meldal-Johnsen]] (2008-2009) (Also occasionally handled guitar, keyboards, backing vocals)
*[[Jeordie White]] (2005-2007) (Also occasionally handled guitar, backing vocals)
====Keyboards====
*[[Charlie Clouser]] (1994-2001) (Also played theremin on the Fragility Tour, some drums on the [[Dissonance]] Tour)