Terps right-hander Zach Thompson allowed four runs over four innings.
The Terps racked up 11 hits and generated 11 walks.
While Dean issued five walks, he kept the Bulldogs off the board while on the mound.
After posting just five runs in three games against Coastal Carolina, the Terps were potent on Wednesday.
"We just gave them too much," Maryland coach Rob Vaughn said.
The Chanticleers outscored the Terps 29-5 in the series.
The Chanticleers put up seven runs combined in the seventh and eighth innings.
The Chanticleers won a national championship in 2016.
“We’ve just got to make sure we treat those as just as important as the weekend games."
The Patriots issued 14 walks, hit four batters and threw three wild pitches.