The Jaspers (19-10) forced 23 turnovers, leading to 22 points in the Bracket Busters contest.
Koita Mohamed added 11 points for the Jaspers, who led 34-28 at halftime and by as any as 19 with 13:20 to go.
Andujar and Beamon had three steals each, pacing Manhattan to 13, giving the Seahawks their fourth straight loss.
The Jaspers shot 80 percent from the free-throw line (24 of 30), while the Seahawks struggled from the field.
UNC Wilmington (9-18) shot 35.1 (20 of 57), hampered by its long-range shooting. The Seahawks made just 1 of 15 3-pointers, including missing all eight of their first half shots.
Keith Rendleman led the Seahawks with 21 points and Adam Smith added 10.
- UNC Wilmington