Mankato East scored two goals in each period on Saturday to pull away from Red Wing, 6-2.
The Wingers' first goal came from Jack Maroushek early in the second period, which pulled Red Wing to within two goals. But the Cougars answered a few minutes later to make it 4-1.
Winger Derek Gielau made it a two-goal game with 10 minutes, 13 seconds left in the second, but the Cougars stymied Red Wing the rest of the way while adding two more goals in the third.
Zach Harding faced 41 shots in the loss, making 35 saves. Jack Cusey stopped 23 of 25 Winger shots on goal.
Red Wing (1-8) hosts Faribault on Thursday.