Mary B. Bates is listed in the credits for the following albums:
| Year | Artist | Album | Role |
|---|---|---|---|
| 1986 | Carman | A Long Time Ago in a Land Called Bethleham | Background Vocals |
| 1987 | Steve Taylor | I Predict 1990 | Operatic Vocals |
| 1988 | Sandi Patty | Make His Praise Glorious | Background Vocals |
| 1989 | Michael W. Smith | Christmas | Background Vocals |
