Isaac Williams scored 19 points and eight rebounds to lead Texas Lutheran (2-7), and Michael Floors added 14 points.
Texas Lutheran twice built five-point cushions and never let the Bobcats lead in the first 10 minutes of the game. But Texas State took its first lead with about 10 minutes left in the half and never relinquished the advantage.
Texas State outrebounded the Bulldogs 45-26 and hit 34 of 65 from the field (52.3 percent). Texas Lutheran made 25 of 52 (48.1 percent).