Ryan Bowie finished with 14 points and nine rebounds, and Keon Lewis and Christian Wilson each added 15 points for Texas-San Antonio (2-1). The rebound battle tipped in favor of the roadrunners 39-28.
D.J. Brown tallied 16 points, including four 3-pointers and Emani Grant had 13 points, eight rebounds, five assists and four steals for Texas State (2-1).
Fueled by six early points by Grant, Texas State jumped out to an early 25-11 lead. Then Grant hit a pair of free throws and a layup to close out the half up 40-33.
But Texas-San Antonio started the second half on a 16-8 run to take a 49-48 lead. The Roadrunners closed out on a 20-8 run, highlighted by a dunk leading to a three-point play by Wilson.