Duncan Mullins is listed in the credits for the following albums:
| Year | Artist | Album | Role |
|---|---|---|---|
| 1984 | Gordon Jensen | Fighting the Fight | Bass |
| 1984 | Amy Grant | Straight Ahead | Bass |
| 1987 | Buddy Greene | Praise Harmonica | Bass |
| 1988 | Bruce Carroll | Richest Man In Town | Bass |
| 1988 | Buddy Greene | Slice Of Life | Bass |
| 1988 | Ruscha | Come Alive | Bass |
| 1990 | Bruce Carroll | Great Exchange | Bass |
| 1990 | Buddy Greene | Sojourner's Song | Fretless Bass, Electric Bass |
| 1991 | Margo Smith and Holly | Just the Beginning | Bass |
| 1997 | Bruce Carroll | For The Record | Bass |
| 1998 | The Cathedrals | Faithful | Bass |
| 2005 | Bruce Carroll | Big World | Bass |
| 2012 | Gordon Mote | Songs I Grew Up Singing | Bass |
| 2014 | Billy Sprague | Songs in the Key of Awe | Bass |
