Donnelly scored and added an assist across Maryland's two games last weekend.
Wildcats forward Bente Baekers slotted past Noelle Frost late in the fourth quarter to secure the victory.
Donnelly has taken more shots than anyone else in the Big Ten through two games.
The Terps failed to find the back of the net on nine penalty corner attempts against Northwestern.
Zywna scored her first career goals for the Terps against Michigan State.
The Wildcats scored two goals in the third quarter to get past the Terps.
Fueled by goals from Kyler Greenwalt and Sam Zywna, the Terps rolled past the Spartans.
The Terps held practice tournaments throughout the fall, giving players a chance to stay fresh and build chemistry.