You might have a favorite book or film, but you can only watch or read it so many times before you have to let it sit and then go back and realize it's your favorite still. At some point everything gets a little stale and you have to step away from it.

(banjo on the Lynyrd Skynyrd cover "Tuesday's Gone")
1998 – Bloem de Ligny – Zink (vocals on the track "Capsule")
1999 – Tom Waits – Mule Variations (on the track "Big in Japan")
1999 – Kenny Wayne Shepherd Band – Live On (on the track "Oh Well")
1999 – Limp Bizkit – Significant Other (vocals on the hidden track "The Mind of Les" bass and vocals on the outtake "Hell of a Band")
1999 – Phonopsycograph Disk – Live @ Slim's / Turbulence Chest (additional bass on 8 of the 12 tracks)
2002 – Gov't Mule – The Deep End Volume 2 (bass and vocals on the tracks "Greasy Granny's Gopher Gravy" and "Drivin' Rain")
2003 – Gov't Mule – The Deepest End Live In Concert (bass and vocals on the tracks "Greasy Granny's Gopher Gravy" and "Drivin' Rain")
2004 – Tom Waits – Real Gone (on the tracks "Hoist That Rag" "Shake It" and "Baby Gonna Leave Me")
2004 – Jack Irons – Attention Dimension (on the Pink Floyd cover "Shine On You Crazy Diamond")
2005 – Adrian Belew – Side One (on the tracks "Ampersand" "Writing on the Wall" and "Matchless Man")
2005 – Gabby La La – Be Careful What You Wish For. Les composed several songs for the Wii game Mushroom Men released in December 2008. A close family friend Rhys Hickman taught him the basics of the slap bass technique which he mastered throughout his educational period.

Claypool has also self-produced and engineered his solo releases from his own studio "Rancho Relaxo". Claypool's playing style on the electric bass mixes tapping flamenco-like strumming whammy bar bends and slapping.