LaFontaine got things started. The junior moved the puck into the offensive zone and sent it to Casey Nelson at the point. Nelson gave it right back, and LaFontaine dangled around a defender before wristing a rocket past goalie Matt Grogan.
LaFontaine was benched for a portion of Friday's series opener after taking a bad penalty, but he made up for that on Saturday.
"J.P. played a real fast game tonight," Hastings said, "and when he does that, his abilities come to the top."
A little more than 2 minutes later, Leitner made the pretty play, backhanding a blind pass out of the corner to Gervais, who was open between the circles and calling for the puck. Gervais collected the pass and scored his second goal of the season.
"We had a good week of practice (after losing twice at Providence)," Leitner said. "We got back to the little things, being hard to play against. We weren't hard to play against last week. We were soft to play against."
The Huskies tied the game on a Jordan Sims power-play goal at 12:02.
It looked like the Mavericks would carry the slim 2-1 lead into the first intermission despite a lopsided shot advantage (19-6 in the first period). But a late rush by MSU's top line made it 3-1. Margonari finished off the play, scoring his second goal of the series with 14.2 seconds to go before the break. Teddy Blueger and Johnny McInnis assisted. It was McInnis' third assist of the weekend.
"Everyone pulled a little bit of the rope tonight," Leitner said.
After a scoreless third period, the Mavericks opened it up in the third. After Nelson's goal, Chase Grant redirected a shot by Leitner at 13:03, and Jordan Nelson (no relation to Casey and Josh) added a power-play goal in the game's final minute.
The Mavericks (2-2-0) are idle next weekend. Their next action is Nov. 1-2 when they open their WCHA schedule at Bemidji State.