Jacob Davison added 12 points and six assists and Ellis Magnuson had 10 points and seven assists for the Eagles (7-3), made 13 of 36 3-pointers and shot 54% overall. They also had a 49-32 rebounding advantage.
Matt Pile nine had for the Mavericks (6-8), who went 3 of 16 from 3-point range and shot 33% overall.
Eastern Washington faces Gonzaga on the road on Saturday. Nebraska Omaha takes on Montana at home on Saturday.