| Musician | Appearances |
|---|---|
| Jordan Rudess | 12 albums |
| Bert Baldwin | 2 albums |
| Rod Morgenstein | 2 albums |
| Steve Morse | 2 albums |
| Kip Winger | 2 albums |
| Chris Amelar | 1 album |
| Barbara Bock | 1 album |
| Terry Bozzio | 1 album |
| Barry Carl | 1 album |
| Nick D'Virgilio | 1 album |
| Peter Ernst | 1 album |
| Eugene Friesen | 1 album |
| Ricky Garcia | 1 album |
| Guthrie Govan | 1 album |
| Greg Howe | 1 album |
| Daniel Jakubovic | 1 album |
| Dave LaRue | 1 album |
| Ken Mary | 1 album |
| Vinnie Moore | 1 album |
| Neal Morse | 1 album |
| John Petrucci | 1 album |
| Bill Ruyle | 1 album |
| Joe Satriani | 1 album |
| Marco Sfogli | 1 album |
| Billy Sheehan | 1 album |
| Jim Simmons | 1 album |
| Ron "Bumblefoot" Thal | 1 album |
| Steven Wilson | 1 album |
| Mark Wood | 1 album |
| Ed Wynne | 1 album |