| Year | Debater | Record | Result |
|---|---|---|---|
| 1996 | Jodi Hegel & Alicia Juárez | 4-2 | Quarterfinalist |
| 1995 | Jodi Hegel & Alicia Juárez | 0-6 | Did Not Clear |
| 1994 | Cathy Hwang & Mike Sturgis | Unknown | Did Not Clear |
| 1979 | 2-2 | Did Not Clear | |
| 1978 | Paul Belk & Brad Peterson | Unknown | Did Not Clear |
| 1977 | Unknown | Did Not Clear | |
| 1976 | Unknown | Quarterfinalist | |
| 1975 | Unknown | Did Not Clear | |
| 1974 | Unknown | Semifinalist | |
| 1973 | Unknown | Champion | |
| 1972 | Unknown | Did Not Clear | |
| 1970 | 5-5 | 13rd Place | |
| 1969 | 6-4 | 11st Place | |
| 1968 | 9-1 | 3rd Place | |
| 1967 | 6-4 | 10th Place | |
| 1966 | 6-4 | 8th Place | |
| 1965 | 7-3 | 5th Place | |
| 1963 | 5-5 | 13rd Place |