The Mavericks were out-hit 13-8 in Wednesday's game at Clay Gould Ballpark.
The Mavs brought the tying run to the plate in the 9th before ending the game with a ground out.
UT Arlington will rely on seven returners and nine newcomers on its pitching staff this season.
UT Arlington raced out to a 9-1 lead before holding on for its third straight win.
UT Arlington improved to 18-23 overall and 3-5 against the Big 12.
Prior to UT Arlington (Northeast Texas Junior College)