| Year | Debater | Record | Result |
|---|---|---|---|
| 2002 | Samantha Evans & Haley Seaberg | 6-0 | Finalist |
| 2000 | Samantha Evans & Katie Lewsader | 4-2 | Quarterfinalist |
| 1999 | Samantha Evans & Katie Lundquist | 4-2 | Quarterfinalist |
| 1998 | Sherene Judeh & Sarah Topp | 4-2 | Semifinalist |
| 1998 | Katie Lewsader & Katie Lundquist | 2-4 | Did Not Clear |
| 1995 | Lindsay Francis & Ami Vruno | 3-3 | Did Not Clear |
| 1993 | Steven Kalla & Ami Vruno | 1-3 | Did Not Clear |
| 1989 | 4-0 | Semifinalist | |
| 1988 | Denise Gardiner & Drew Krueger | 2-2 | Octafinalist |
| 1987 | James Lansing & Carl Lehmann | 3-1 | Champion |
| 1987 | Jon Kalla & Andrew Krueger | 2-2 | Octafinalist |
| 1986 | James Lansing & Carl Lehmann | 4-0 | Champion |
| 1984 | Chris Kalla & Matt Traxler | 3-1 | Octafinalist |
| 1983 | 2-2 | Quarterfinalist | |
| 1982 | Kelly Kadera & Phil Voight | 3-1 | Champion |
| 1981 | 4-0 | Quarterfinalist | |
| 1981 | David Reid & Phil Voight | 3-1 | Finalist |
| 1980 | 2-2 | Octafinalist | |
| 1980 | 4-0 | Octafinalist | |
| 1979 | 3-1 | Quarterfinalist | |
| 1979 | 3-1 | Octafinalist | |
| 1978 | Mark Bergquist & Kathy Heaney | Unknown | Quarterfinalist |
| 1977 | Unknown | Octafinalist | |
| 1976 | Unknown | Did Not Clear | |
| 1973 | Unknown | Did Not Clear | |
| 1972 | Unknown | Did Not Clear | |
| 1971 | Unknown | Did Not Clear | |
| 1970 | 6-4 | 10th Place | |
| 1969 | 7-3 | 10th Place | |
| 1966 | 3-7 | 19th Place | |
| 1965 | 8-2 | 3rd Place | |
| 1964 | 7-3 | 5th Place | |
| 1962 | 7-3 | 6th Place | |
| 1961 | 7-3 | 6th Place | |
| 1959 | 3-3 | 10th Place | |
| 1958 | 5-1 | 1st Place | |
| 1957 | 4-2 | 7th Place | |
| 1956 | 6-0 | 1st Place | |
| 1955 | 6-0 | 1st Place | |
| 1954 | Karen Seeger, Sharon Schultz, Robert Rolle & Ken Holmes | 6-0 | 1st Place |
| 1953 | 6-0 | 1st Place | |
| 1952 | 5-1 | 2nd Place | |
| 1951 | 5-1 | 1st Place | |
| 1950 | James Swenson, Walter Nickel, Josephine Gridley & Jean Wood | 6-0 | 1st Place |
| 1949 | Duane Daubs, Walter Nickel, James Swenson & Helen Turnblom | 4-2 | 2nd Place |
| 1948 | Maynard Jacobson & James Manthey | 2-2 | Unknown |
| 1947 | Thomas Kennelly & Hartland Schmidt | 4-0 | 2nd Place |
| 1946 | Wally McGill & Chester Taylor | 2-2 | 4th Place |
| 1945 | N/A | Quarterfinalist | |
| 1944 | Patricia Lanegran & Emmy Lou Lindgren | N/A | Champion |
| 1937 | N/A | Semifinalist | |
| 1933 | Leonard Cowley, Francis Gamelin & Abner George | N/A | Semifinalist |
| 1930 | Ellen Murray, Gwendolyn Rude & Marcella Selton | N/A | Quarterfinalist |
| 1929 | Catherine Cowley, Francis Lane & Robert Yount | N/A | Quarterfinalist |