| Musician | Appearances |
|---|---|
| Terry Bozzio | 2 albums |
| Trent Gardner | 2 albums |
| James Labrie | 2 albums |
| Michael Bemesderfer | 1 album |
| Matt Bradley | 1 album |
| D.C. Cooper | 1 album |
| Bret Douglas | 1 album |
| Marty Friedman | 1 album |
| Wayne Gardner | 1 album |
| Matt Guillory | 1 album |
| Steve Howe | 1 album |
| Kerry Livgren | 1 album |
| James Murphy | 1 album |
| John Myung | 1 album |
| John Petrucci | 1 album |
| Mark Robertson | 1 album |
| Billy Sheehan | 1 album |
| Derek Sherinian | 1 album |
| Steve Walsh | 1 album |
| Gary Wehrcamp | 1 album |