After a scoreless first half, Bailey Graf got the Cougars (2-0, 4-2) on the board with an assist from Jenna Caldwell.
Becca Rinaca tallied the North Harford goal with assist from Kara Parks.
Marisa Perfetti put the Cougars in the win column with an assist by Lindsay Summers in OT.
Cougars goalie Sarah DiMaggio had a huge day, making 32 saves, while Hawks keeper Abby Phillips made four saves.
Mustangs blank Tigers
C. Milton Wright pushed its record to 5-1 overall and 1-0 in Chesapeake play after a 5-0 win over visiting Rising Sun Friday. Sophomore midfielder Sabrina Rhodes led the attack with three goals, including a penalty stroke during the second half. Fellow sophomores Emily Brandt and Madie Adams each contributed a goal. Assists were credited to Rhodes, Brandt, junior Maggie Gallagher and senior Brooke Williams.
C. Milton Wright recorded its fourth shutout of the season as goalies sophomore Sydney Rhodes and junior Nicole Leighty split duty in the cage.
Eagles, Cobras tie
Aberdeen (0-1-1, 1-3-1) and visiting Harford Tech played to a 1-1 tie after regulation, overtime and strokes in Susquehanna play Friday. Both teams scored a goal in strokes.
Aberdeen's goal was scored by Caroline Huang and Tech's goal was scored by Brittany Kapustensky.
Rams edge Warriors
Edgewood slid past visiting Havre de Grace, 1-0, Friday in Susquehanna play. Morgan Williams scored the game's only goal unassisted. Edgewood (1-1, 3-2) keeper Lissette Yeargain had no saves and Havre de Grace (0-2, 0-5) goalie Taylor Smith had 10 saves.
Panthers beat Mariners
Joppatowne was beaten at Perryville, 2-0, in Susquehanna play Friday. Hannah Wein and Lydia Hill tallied Perryville (3-0, 4-2) goals with Brooke Hornberger adding one assist.
Panthers goalie Britany Gibson made two saves and Joppatowne (1-1, 4-2) keeper April Kinyua had 15 saves.