Havre de Grace, which led 8-7 at the break, pulled away to improve to 6-2.
Carly Thompson scored five goals with an assist to lead the Warriors attack.
Haley Dean had four goals and Margaret Stump scored three and assisted on two others.
Katie Thompson had two goals and an assist, while Eva Villareal and Briana Haffey had two goals each.
Kara Neiberlein and Haley Stewart had single goals. Rebecca Angelini had one assist.
Abbie Blessing made 12 stops in the Warriors goal.
The Thompson twins maintained possession for the Warriors, as Katie and Carly had four draw controls each.