Tommy Cathey is listed in the credits for the following albums:
| Year | Artist | Album | Role |
|---|---|---|---|
| 1982 | DeGarmo & Key | No Turning Back: Live | Bass, Vocals |
| 1983 | DeGarmo & Key | Mission of Mercy | Bass, Vocals |
| 1984 | DeGarmo & Key | Communication | Bass, Vocals |
| 1985 | DeGarmo & Key | Commander Sozo & the Charge of the Light Brigade | Bass, Background Vocals |
| 1986 | DeGarmo & Key | Street Light | Bass, Background Vocals |
| 1987 | DeGarmo & Key | D & K | Bass, Background Vocals |
| 1987 | DeGarmo & Key | Streetrock | Bass, Background Vocals |
| 1988 | DeGarmo & Key | Rock Solid: Absolutely Live | Bass, Background Vocals |
| 1989 | DeGarmo & Key | The Pledge | Bass, Background Vocals |
| 1991 | DeGarmo & Key | Go to the Top | Bass, Bass Arranger, Background Vocals |
| 1994 | DeGarmo & Key | To Extremes | Bass, Background Vocals |
| 1997 | E.T.W. | Ain't Nobody Dyin' But Us | Producer |
