The Terps gave up five runs in the sixth to pick up their third straight defeat.
The Terps surrendered four runs in the fifth inning of the second game to fall behind for good.
The Terps won the series 3-1, with Jaeda McFarland playing hero in the final game of the weekend.
A bases-clearing error in the seventh inning lifted the Terps to a series win.
The Terps took a low-scoring defensive battle in game one and exploded for 11 runs in game two.
The Terps managed just one run in 14 innings of play Saturday.
The Terps cruised in the first game and walked off the Spartans in the second contest.
The Terps' bats fell quiet in game one but roared to life in game two for a mercy-rule victory.
Six of the Terps' first 12 contests have gone beyond seven innings.