Danni Bock scored her first two goals of the season for the Gators (3-1).
Alexa and Preslie Quarnata each netted a goal and goalie Emily Shandruk made four saves.
The Gators will host Parkville on Wednesday while the Lions (1-3) will host Towson.
No. 20 Perry Hall 4, Dulaney 0
Goals: PH-Bock 2, A.Quaranta, P. Quarnata.
Saves: PH-Shandruk 4.