| Musician | Appearances |
|---|---|
| Peter DiStefano | 2 albums |
| Perry Farrell | 2 albums |
| Martyn LeNoble | 2 albums |
| Stephen Perkins | 2 albums |
| Daniel Ash | 1 album |
| Michael "Flea" Balzary | 1 album |
| Christine Cagle | 1 album |
| Leo Chelyapov | 1 album |
| John Flannery | 1 album |
| David J Haskins | 1 album |
| Lili Haydn | 1 album |
| Matt Hyde | 1 album |
| Thomas Johnson | 1 album |
| Kimberly Juarez | 1 album |
| Josh "Bagel" Klassman | 1 album |
| Shawn London | 1 album |
| Dave Navarro | 1 album |
| Ralf Rickert | 1 album |
| Mike Watt | 1 album |