The Flashes' first five hitters were 7-15 with an RBI apiece.
Golden Flash starter Dirk Hayhurst (1-2) kept the Mountaineers in check all night pitching six innings and allowing no runs while striking out six to pick up the victory.
Biggs surrendered five runs on 10 hits while striking out eight and walking none in his first start since throwing a no-hitter against Buffalo.
Down 5-0, WVU tried to rally in the bottom of the eighth when Kurtis Clinton led off the inning with a single to left field. Tim McCabe followed with another single to left. Psomas hit his first home run of the year over the left field wall off reliever Shane Curry. The Mountaineers would later load the bases in that same inning, but were unable to convert.
For the game, WVU left the bases loaded twice and stranded a total of 11 runners on base.
The Mountaineers return to action on Saturday, March 16, for a double-header against Kent State at 1:00 p.m.