New Mexico State (13-10, 5-1 Western Athletic Conference) has won three straight and eight of its last nine games.
The Aggies led by as many as 16 points, and had a 14-point lead with 6:47 to play. Texas-Pan American chipped way, using a 13-1 run to pull within 48-46 with 2:33 left. Mullings missed a pair of free throws, but the Broncs couldn't capitalize when Tshilidzi Nephawe blocked Shaquille Hines's layup, and Shaquille Boga missed a 3 with 41 seconds left.
The Aggies made 5 of 6 free throws down the stretch, and finished 15 of 24 from the line to seal it.
Janari Joesaar scored 23 points and Boga added 16 to lead Texas-Pan American (8-14, 2-4).