Nelson drove in three runs to lead the way for the Wildcats.
Trinity Schlotterbeck led the way for the Terps, striking out 12 batters and posting a 0.63 ERA in the opening weekend.
Taylor Okada drove in the game winning run in extra innings to salvage a 1-1 set against the Fighting Illini.
Jaeda McFarland scored two runs to give the Terps a decisive victory in the second game of the set.
The Terps sport a slew of new faces and are looking to build off a pandemic-shortened 12-11 campaign.