The Ephs and Polar Bears first met in 2001
Williams leads the all-time series 4-3 through 2010.
| Year | Winner | Location (W/B) |
Score | Tournament |
| 2010 | Bowdoin | W | 6-0 | NESCAC |
| 2010 | Bowdoin | Neutral | 8-1 | NESCAC |
| 2004 | Williams | Neutral | 2-1 | NESCAC |
| 2002 | Williams | Neutral | 4-3 | NESCAC |
| 2002 | Williams | Neutral | 1-0 | NESCAC |
| 2001 | Bowdoin | Neutral | 9-3 | NESCAC |
| 2001 | Williams | Neutral | 9-0 | NESCAC |
