Christian Hollie recorded three hits with one triple and one double on Saturday.
UTA wrapped up its home opener with a 7-0 victory of Southeastern Louisiana.
The Mavs brought the tying run to the plate in the 9th before ending the game with a ground out.
UT Arlington scored 18 runs while hitting .414 in the Sunday afternoon game.
Missouri State scored seven unanswered runs to take a 7-2 victory against UTA.