The Terps added four pitchers that looked like they would help a steady group of returning arms but the staff has struggled so far this season.
The two pitchers totaled 11 strikeouts with no walks as the Terps cruised to their first series sweep of the season.
The Terps' relievers have collectively pitched to a 7.66 ERA so far this year.
The Terps gave up five runs in the first inning as they suffered their second loss of the season.
The Terps had 20 hits and were powered by an 11-strikeout performance by starting pitcher Ryan Ramsey.
While other programs around the country canceled midweek games, the Terps easily defeated the Dukes.
Bobby Zmarzlak's 10th-inning home run secured the victory for the Terps.
Freshman Jacob Orr finished with five RBIs in Terps' comeback win.
Costes' two-run blast energized the Terps during a rainy matchup with the Patriots.