The Lady Owls committed 22 turnovers during the contest, but had significant advantages in field-goal shooting (41.2-22.5 percent) and rebounding (38-25). The Gremlins were playing without their No. 1 post, senior Sydney Smith, and their next two forwards got into foul trouble as a result of Marshall's relative strength inside.
Junior Karson Heying made a lay-up, sophomore Molly Evans knocked down a three-pointer and a put-back by sophomore Briana Bellamy put the Lady Owls up 7-4 before junior Kelsey Keele's bomb tied the game.
Senior Kate Wadley's follow shot gave Sacred Heart a four-point lead midway through the second period, but sophomore Lauren Hare connected from outside and junior Payton Beeler came up with a steal for a fast-break bucket with eight seconds left in the half to give Marshall a 16-13 edge.
Two quick goals by senior Jashawna Terry coming out of the break allowed the Lady Owls to stay in front, but four straight giveaways kept them from pulling away. Fortunately for Marshall, the Lady Gremlins made only two of nine shots and coughed the ball up six times during the third period, so Heying's conventional three-point play with 47 seconds left extended the margin to 27-18.
Evans struck from the perimeter for a double-digit Lady Owl lead a minute into the final stanza, but that was followed by a four-minute dry spell. Again, Sacred Heart couldn't capitalize, missing eight straight shots from the floor before senior Kayla Holland's stick-back reduced the deficit to nine points with 1:25 to go.
Evans converted two free throws and junior Katie Wansing rebounded a missed charity shot and put the ball back in the hole with nine seconds remaining to seal the win.
Junior Honor Kehde led all scorers with 10 points, making eight of 12 from the line, for the Lady Gremlins (1-2).
Evans and Terry each had eight points, while Wansing and sophomore Makala Colbert had seven boards apiece, for pace Marshall.
The Lady Owls (2-1) will be at home today to begin NCMC play against Mexico.