The Mavericks improved to 17-23 overall and 9-9 in the Sun Belt Conference.
The Mavericks couldn't hold onto a 9-7 lead going into the bottom of the seventh.
UTA won its fifth straight Sun Belt game to open the day, but lost the second in extra innings.
UTA takes on Columbia on Wednesday to continue a five-game homestand at 6:30 p.m.
UTA and Texas State continue the series on Saturday at 3 p.m.