John Wirtz is listed in the credits for the following albums:
| Year | Artist | Album | Role |
|---|---|---|---|
| 1989 | Danny 'D-Boy' Rodriguez | Plantin' a Seed | Engineer |
| 1990 | Washington | Every Time | Engineer, Mixed, Vocal Production Assistance, Songwriter |
| 1990 | Tim Miner | A True Story | Engineered, Mixed |
| 1990 | Danny 'D-Boy' Rodriguez | Lyrical Strength of One Street Poet | Producer, Engineer, Mixed, Songwriter, Programming, Break Ad-Libs, Vocals |
| 1991 | Yvonne Belieu | More Than Emotion | Producer, Mixing, Engineering, Keyboards |
| 1991 | Tru 4U | We R Here | Producer |
| 1991 | Washington | Serious | Producer, Engineer, Mixed, Songwriter, All Programming, Keyboards, Background Vocals |
| 1991 | M.C. GeGee | ...And Now the Mission Continues | Producer, Mixed, Songwriter, Keyboards, Programming, Background Vocals |
| 1991 | Angie Alan | The Bottom Line | Mixed, Drum Samples |
