Mark Kelly is listed in the credits for the following albums:
| Year | Artist | Album | Role |
|---|---|---|---|
| 1981 | Petra | Never Say Die | Bass, Background Vocals |
| 1982 | Petra | More Power to Ya | Bass, Lead and Background Vocals |
| 1983 | Petra | Not of This World | Bass, Background Vocals |
| 1984 | Petra | Beat the System | Bass Guitar, Synthesizer Bass, Background Vocals |
| 1986 | Petra | Captured in Time & Space | Bass Guitar, Keyboard Bass |
| 1986 | Petra | Back to the Street | Bass |
| 1987 | Petra | This Means War! | Bass, Background Vocals |
| 1989 | Petra | Petra Means Rock | Bass Guitar, Synthesizer Bass, Background Vocals |
| 1990 | Petra | War and Remembrance: 15 Years Of Rock | Bass, Background Vocals |
| 1991 | Petra | Petrafied: The Best of Petra | Bass, Background Vocals |
| 1992 | Petra | Petraphonics | Arranger, Songwriter, Lead and Acoustic Guitars, Background Vocals |
| 1993 | Petra | The Power of Praise | Bass, Background Vocals |
| 1995 | Petra | Rock Block | Bass Guitar, Synthesizer Bass, Background Vocals |
| 1996 | Petra | The Early Years | Bass, Background Vocals |
| 2002 | Petra | Still Means War! | Bass, Background Vocals |
