Senior guard Jamel Outler drilled a career-high seven 3-pointers on his way to 26 points.
UT Arlington improved to 2-1 with its second nonconference road win of the season.
The Mavericks are 1-1 going into Thursday night's visit to Grand Canyon in Phoenix.
UT Arlington missed 22 of 31 3-pointers in its home opening loss Tuesday night.
UT Arlington is 7-1 in home openers under Scott Cross.
Before UT Arlington (Illinois State)