Michigan State tied No. 5 North Dakota 2-2 on Saturday night at Ralph Engelstad Arena in Grand Forks, then scored in the second overtime played with three skaters a side to further dampen the Fighting Hawks' weekend.
The Spartans (4-6-1) won the series opener 4-3. As for the second game, it will officially count as a tie because neither team scored in the first overtime. It ended with Jerad Rosburg scoring 58 seconds into the second extra period.
The Fighting Hawks (7-6-2) took a 2-1 lead after the opening period on goals by Zach Yon and Tucker Poolman.
Michigan 4, Lake Superior State 1: Defenseman Nolan De Jong's goal midway through the second period was the winner as the Wolverines (6-5-1) beat the Lakers (7-7) to split their series. Lake Superior State won the opener 3-1.
Princeton 3, Bemidji State 1: Ben Halford stopped 43 shots as the Tigers (2-6-1) upset the No. 10 Beavers (11-3-1) for the second night in Bemidji. Princeton won the opener 4-1. In the rematch, Bemidji State took a 1-0 lead late in the first period on Nate Arentz's penalty shot. David Hallisey of the Tigers scored twice in the second period, the second time on a power play.