Alyssa Poarch and Mikayla Dayes each scored.
The Badgers twice in two minutes in the second half.
The Terps have yet to lose at home this season.
Flippens made her season debut Sunday against Princeton and notched two assists.
Dayes hasn't missed a minute of playing time this season.
Ray Leone reached 300 wins and Jlon Flippens returned from injury.
Coach Ray Leone earned his 300th win.
Keyera Wynn scored her first career goal for the Terps.
Seppi notched co-Big Ten Goalkeeper of the Week honors for her efforts against George Mason and George Washington.
Seppi posted a career-high 11 saves against George Washington.