Jennifer Brann allowed no runs and one hit while striking out seven in 4.1 innings.
Sammie Stefan's first-inning blast was enough for the Terps to take their second straight from the Scarlet Knights.
The Terps' bats came to life in the third inning of game two in order to salvage a split.
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 won their first home series in nearly three years.
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.
Nelson drove in three runs to lead the way for the Wildcats.
The Terps exploded late in the first game for a six-run victory, while the Buckeyes won on mercy rule in the second contest.