Hoosiers pitcher Tara Trainer stymied the Terps hitters.
Voulgaris has learned the quirks of the Terps' five pitchers and has produced at the plate.
The Terps totaled 36 hits against the Spartans, their most in a three-game series since 2015.
The Spartans' seven-run fourth inning put the game out of reach.
The Terps escaped a bases-loaded jam in the seventh, but the Spartans broke through in the next frame.
The Terps opened a 10-0 lead in the fourth inning.
In one game over the weekend, the Terps completely emptied their bench.