Shenandoah (15-9, 7-7 ODAC) took an 8-4 lead in the bottom of the sixth following Keegan Woolford's three-run HR, but saw Bridgewater (11-18, 5-9) score seven runs in the seventh to rally for the win.
The Eagles needed just three hits against four SU pitchers to score the seven runs as the Hornets issued five bases on balls and hit one batter in the frame.
Two of the walks and the hit batsman came with two outs and the bases loaded.
The two teams traded runs in the eighth before Shenandoah brought the tying run to the plate in the ninth as Frankie Ritter and Tristan Baker led off the inning with a pair of singles through the left side.
Bridgewater got out of it on a pair of groundouts and a strikeout.
Ryan Mason (1-0) got the win with one inning of relief work and Brett Tharp recorded his first save by getting the final four outs of the contest.
Matt Barnes (1-1), the second of the four pitchers in the seventh took the loss. He allowed four runs on two hits, one walk and one hit batsmen in 1/3 of an inning.
Nussman and Thompson also drove in two runs each with Woolford recording four RBI on the day. Woolford was 1-for-2 with four RBI and four walks.
Shenandoah takes to the road Wednesday for a 3:30 non-league contest at Dickinson.