Sioux Falls grabbed a 2-1 lead after one period with goals by Artem Ivanyuzhenkov and Nolan Walker. Emilio Petterson scored for Muskegon.
Ivanyuzhenkov scored again early in the second period to give the Stampede a 3-1 lead. The Lumberjacks roared back later in the second with goals from Matej Pekar and Anthony Del Gaizo to tie the score 3-3 after two periods.
Sioux Falls pulled ahead again with a goal from Adam Dawe at 7:16 of the third period, then sealed up the win with an empty-netter by Mitchell Mattson with seven seconds left in the game.
Sioux Falls scored twice on four power play opportunities, while the Jacks were 0-for-4 with a man advantage.
Muskegon outshot Sioux Falls 33-30. Lumberjacks goalie Keegan Karki stopped 26 shots in the losing effort.