Bailey Olson scored a pair of unassisted short handed goals in the first period to stake the Cardinals to a 2-0 lead. Madison Garberding, assisted by Makenna Larson, and Nina Dawson, assisted by Ashley Larson and Tanna Christensen, also scored first period goals as the Cardinals built a 4-0 lead after one.
Ashley Larson scored from Dawson at 1:40 of the third to make it 5-0 and the Otters got their goal at 1:59 when Ellie Andersen converted from Jadyn Bye.
Fergus Falls (8-8-1) will end their regular season schedule with a home game against Bemidji on Friday night.