The Lady Tigers (1-3) also got 13 points on 5-of-7 shooting and four assists from forward Shaneese McLin, who was named the Carrs/Safeway Player of the Game.
Guard Whitney Ligon led the Matadors (0-6) with a game-high 17 points on 6-of-10 shooting, while reserve guard Ashley Blake scored 14 points, making 4 of 8 from three-point land.
The game was a single-digit affair before Cal State Northridge built a 59-48 lead with remaining. But the Lady Tigers answered with a 17-3 run over the next four minutes, going up 65-62 on a short jumper by center Erica Trahan (11 pts).
Blake responded with a three-pointer from the corner to knot the score with remaining, but the Matadors would not score again.
JSU, of the Southwestern Athletic Conference, took the lead for good on its next possession when Phenicia Taylor (6 assists) found Haggen on the baseline for a wide-open 12-foot jumper.
After a Northridge miss, JSU broke defensive pressure and McLin found Haggen wide open under the bucket for a fast-break layup, essentially sealing the victory.
Both teams were making their first Shootout appearances.