At Belfast, Rachel Frye pitched a one-hit shutout, striking out four and walking one to lead the Mariners to the victory.
Frye had a double as well for Oceanside of Rockland. Kennadi Grover had a hit and two walks and Ari Curtis had a hit.
Ashley Littlefield pitched a complete game for Belfast, giving up three hits while striking out eight and walking seven. Grace Davis singled and walked.