The Terps have not clinched a series at the Maryland Softball Complex in nearly three years.
The Terps managed just three hits against the Buckeyes' Allison Smith.
Lindy Milkowski hit a walkoff for the Hawkeyes.
Jaeda McFarland scored two runs to give the Terps a decisive victory in the second game of the set.
It was the Terps' second loss to the Sun Devils in the tournament.
The Terps took three of their four games at the Eagle Round Robin.
The Terps earned their second consecutive win for the first time this season.
Amelia Jarecke got the win against the Islanders.