Williams and Middlebury first played in 1998.
The Ephs lead the Panthers in the all-time series 26-10 through 2011.
| Year |
Winner | Location (W/M) |
Score | Tournament |
| 2011 | Middlebury | M | 5-1 | |
| 2011 | Middlebury | M | 13-2 | |
| 2011 | Middlebury | M | 5-0 | |
| 2010 | Williams | W | 7-6 | |
| 2010 | Williams | W | 7-5 | |
| 2010 | Middlebury | W | 6-2 | |
| 2009 | Williams | N | 14-3 | |
| 2009 | Middlebury | N | 4-2 | |
| 2009 | Williams | N | 12-0 | |
| 2008 |
Williams |
W |
4-3 |
|
| 2008 |
Middlebury |
W |
6-2 |
|
| 2008 | Williams | W | 3-1 | |
| 2007 |
Williams | W |
11-4 |
|
| 2007 | Williams | W | 13-9 | |
| 2007 | Middlebury | W | 2-1 |
|
| 2006 | Williams | W | 5-0 |
|
| 2006 | Williams | W | 4-0 | |
| 2005 | Middlebury |
M | 4-3 | |
| 2005 | Williams | M | 2-0 | |
| 2004 |
Williams |
N |
2-0 | NESCAC |
| 2004 | Middlebury |
W | 1-0 |
|
| 2004 |
Williams | W |
4-1 | |
| 2003 |
Williams |
N | 7-1 | NESCAC |
| 2003 |
Middlebury | N |
8-7 |
|
| 2003 | Williams | N |
11-5 | |
| 2002 | Williams | W |
2-0 | |
| 2002 | Williams | W |
9-1 | |
| 2001 |
Williams | M |
12-2 | |
| 2001 | Williams | M |
3-1 | |
| 2000 | Williams | W |
4-3 | |
| 2000 | Williams | W |
10-2 | |
| 2000 | Williams | W |
5-0 | |
| 1999 | Williams | M |
10-3 | |
| 1999 | Williams | M |
7-0 | |
| 1998 | Williams | W |
6-0 | |
| 1998 | Williams | W |
3-1 |
