The Mavericks improved to 17-23 overall and 9-9 in the Sun Belt Conference.
The Mavericks (16-22) fell to 8-8 in SBC action, snapping a two-game league winning streak.
UTA won its fifth straight Sun Belt game to open the day, but lost the second in extra innings.
The Mavericks (13-17) evened their league record at 5-5 in the series opener.
UT Arlington improved to 11-16 and 3-5 in Sun Belt Conference play going into Sunday's series finale.
Prior to UT Arlington (Howard Junior College)