The Terps trailed at halftime for the first time all season but rallied to beat the Cavaliers.
The Terps battled back from a deficit at halftime, knocking off the Cavaliers at Audi Field.
Goals from Joshua Bolma and Chris Rindov kept the Terps' perfect record in tact.
The freshman forward scored in his first game as a Terp and impressed players and coaches throughout opening weekend.
The Terps scored three first-half goals and held off a late charge from the Retrievers to remain undefeated.
The Terps open their season against No. 18 Charlotte on Thursday.
Jon Koka's winning strike came with 35 seconds left as the Bears and Terps traded three goals in the final 7 minutes.
The Terps will take on Missouri State in the opening round of the tournament.
The Terps suffered a litany of injuries in the lead up to their Big Ten tournament defeat on Wednesday.
The Terps were struck down in the Big Ten tournament's semifinals.