Sammie Stefan's first-inning blast was enough for the Terps to take their second straight from the Scarlet Knights.
The Terps gave up five runs in the sixth to pick up their third straight defeat.
The Terps have been unsteady throughout the season, but hope to keep their current momentum.
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 managed just three hits and failed to score against the Nittany Lions.
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.
Regan Kerr's first inning solo shot was one of just two hits for the Terps.
The Terps cruised in the first game and walked off the Spartans in the second contest.