Visiting Colleton County sent Hilton Head High to a 15-2 defeat in Region 7-4A play Wednesday.
The Cougars collected 10 runs over the final three innings to break open a close game.
Cassie Ruhl and Reagan Marchant plated the Seahawks’ only runs, and Leah Anderson was 2-for-3 at the plate.
The Seahawks (6-5, 0-2) will close out the series at 6:30 p.m. Friday at Colleton County.