North Dakota got a shutout victory at St. Cloud State on Saturday for the second night in a row, beating the Huskies 3-0 in an NCHC game.
Rhett Gardner's power-play goal in the opening period was the winner; in the net, Cam Johnson made 36 saves.
No. 8 UND (7-4-2, 2-3-1 conference) won Friday's game 4-0 with Johnson making 26 stops.
Tucker Poolman and Shane Gersich had the Fighting Hawks' other goals.
The No. 12 Huskies (6-6, 2-4) was 0-for-4 on the power play.
Minnesota Duluth 3, Omaha 2: The No. 2 Bulldogs (10-2-2, 6-1) scored the first three goals and held on to beat the Mavericks (6-5-1, 3-3). Adam Johnson got the first UMD goal at 1:17 of the second period, Dominic Toninato scored shorthanded at 5:15 and Kyle Osterberg on a power play at 10:20. Omaha scored two power-play goals early in the third period. Hunter Miska stopped 33 shots for UMD.
Penn State 8, Arizona State 0: Eight different players scored as the No. 10 Nittany Lions (11-1-1) routed the visiting Sun Devils (2-11).
Ohio State 3, RPI 2: Tanner Laczynski scored midway through the third period to give the No. 14 Buckeyes (8-1-4) a victory over the visiting Engineers (2-10-1). Luke Stork and Sam McCormick had the other goals for Ohio State while Matt Tomkins made 22 saves.
Merrimack 2, Wisconsin 0: Sami Tavernier and Mathieu Tibbert both scored their second goals of the season and Collin Delia made 33 stops as the Warriors (5-6-3) got a split with the host Badgers (6-4). Wisconsin won the first game 3-2.
Bemidji St. 5, Northern Michigan 2: The No. 13 Beavers (11-2-1, 11-0-1) stayed unbeaten in WCHA games by taking a 4-0 lead against the Wildcats (3-10-1, 1-8-1) in the first period. Phillip Marinaccio had two goals and an assist for Bemidji State.