Forrest Maxon scored two goals to lift Morningside to its first GPAC men's soccer win of the season.
Attack errors and service errors hurt the Mustangs in a five-set loss against Mount Marty.
Morningside lost 2-1 in double overtime against Northwestern in Wednesday's GPAC women's soccer contest.
The three-time reigning GPAC champions have made 10 consecutive NAIA post-season appearances
Home of the 2013 GPAC champions
The Mustangs have qualified for the NAIA National Tournament four times in the last six years
Home of the reigning GPAC men's champions