The Mavericks (14-18, 6-6 SBC) won their fifth straight Sun Belt game with a 6-1 to open the day, but lost 6-5 in 10 innings in the second game.
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.
The Mavericks and Red Wolves combined for 26 hits in the rubber match.
The three-game series is tied 1-1 with the rubber match Sunday at 1 p.m.
Prior to UT Arlington (Howard Junior College)