The Mids owned a 5-1 record in one-goal games this season.
The Midshipmen scored five straight goals in the second half and held the Cadets off the scoreboard for nearly 23 minutes.
Navy held Army to its second fewest goals of the 2015 campaign.
Despite the loss, Navy has clinched a spot in the six-team Patriot League Tournament later this month.
Navy, who has won 5 straight Patriot League games, is looking to clinch its ninth Patriot League Tournament appearance with a win on Saturday.
2015 Navy vs. Army MLax
2015 Navy vs. Boston U. MLax
2015 Navy vs. Lehigh MLax
2015 Navy vs. Towson MLax
2015 Navy vs. Bucknell MLax
Flounlacker in 2014 (Fr.): Appeared in eight games, including making his debut in the Mids' opener against VMI ... scored his first career goal off an assist from Tim Roy in the Navy's win over Holy Cross ... it was also his first career shot.
More on Flounlacker: A 2012 graduate of Kent Island High School in Kent Island, Md., Flounlacker spent the 2012-13 academic year at the Naval Academy Prep School ... a three-sport athlete, he earned letters in basketball (2), lacrosse (4) and soccer (2) ... named Kent Island's offensive MVP in lacrosse his senior year ... member of three (2009, `11, `12) Bayside Championship teams in lacrosse ... the 2011 and `12 teams went on to win region titles ... high school teammate of sophomores Brady Dove and Ben Goodrich and freshman DJ Plumer, who are also members of the Navy lacrosse program ... also considered Johns Hopkins and Loyola ... son of York and Robin Flounlacker ... majoring in English.