The Demons weren't so fortunate in game two as Nicholls scored four runs in the third inning and streaked to an 8-4 win to get the Sunday split and the series win.
NSU will now head into the final week of the season against Texas State with an 18-30 record but more importantly, 13-17 in conference play. Nicholls (25-25, 12-17) will visit Stephen F. Austin in the final weekend of play.
With the series loss, the sixth straight in conference play, NSU trails Stephen F. Austin by one game in the league standings for the eighth and final spot in the May 23-26 Southland tournament.
In the first game, relief pitcher Joe Scanio (5-3) took the win after he relieved Bear with two out in the fifth inning. Scanio threw two scoreless innings and gave up three hits with a walk and strikeout. He also became NSU's single-season record holder with his 29th appearance on the year.
Carson Goldsmith notched his third save of the year following 1.1 innings of work with one run allowed, two walks and two strikeouts.
The Demons broke a scoreless tie in the sixth inning after right fielder Kevin Sanford led off the frame with a base-on-balls, stole second, moved to third on a pass ball and scored on a sacrifice fly by Will Watson.
Nicholls tied things up in the bottom of the inning on a one out RBI double by Austin Flores to make it 1-1.
Two runs crossed the plate in the seventh for the Demons behind Hoover's RBI walk and then when Nick Hinojos scored on an error to put NSU up 3-1.
Scanio got the first two batters down in order in the eighth but then let runners get on second and third after a single and double. Goldsmith came in to patch the bleeding with a strikeout and after he walked the first two batters in the ninth, got out of more damage with the help of Nick Purdy catching Bergeron trying to steal second and a grounder to shortstop to end the game.
NSU finished with just four hits in the game while Nicholls collected 10 hits, two each from LeGrange and Zorn.
The second game got off to a rocky start for Demon starter Jamie Bittle as the Colonels jumped out to a 1-0 first inning lead on a RBI single by Jeremy Hill.
The Demons went up 2-1 in the third when Ray Frias singled, Drew Helenihi doubled and Watson singled but the Colonels slapped four singles, drew a walk and was hit-by-a-pitch to highlight a four-run third inning and take a 5-2 lead.
Nicholls added another run in the fifth on a RBI single by Flores and responded to NSU's run in the seventh with a run of its own on a solo home run by Blake Bergeron to make it 7-3.
Another run in the eighth preceded NSU's final run in the ninth to close out the scoring.
Bittle (1-2) took the loss after he allowed five runs, all earned, on four hits in two innings of work. He also walked one and did not strikeout a batter.
J. P. Clifton was the first out of the bullpen and gave up one run on five hits in 2.2 innings with three strikeouts and Andrew Adams allowed two runs on four hits in three innings pitched.
Zach Winchester got the final out of the game with a strikeout.
Michael Suk ran his record to 7-1 after he threw seven innings and gave up three runs, two earned, on seven hits with five strikeouts.
The Demons finished with nine hits in the contest as Watson led the way with a 3-for-4 game with three RBI.
Nicholls added 14 hits and had a 4-for-5 performance by Hill who also scored three runs and knocked in two.
Bergeron finished 3-for-4 with four RBI, Philip Lyons 2-for-5 with two runs scored and Flores 2-for-4 with two RBI.
NSU will next be in action Thursday to open the season finale series against Texas State at Brown-Stroud Field.