The teams entered the game in a three-way tie with Houston Baptist for first place in the Southland Conference, each at 7-0. The win extends the Lumberjacks conference win streak to 16 games and marks their third straight year with at least an 8-0 start.
Clide Geffrard added 15 points and nine rebounds, and Demetrious Floyd had 11 points for the Lumberjacks (15-5, 8-0). Ty Charles scored 10 with eight boards.
Texas A&M-Corpus Christi led 57-53 with 3:23 left, but a Walkup jumper sparked an 11-0 run, capped by a Geffrard dunk, put Stephen F. Austin up 64-57 with 18 seconds left.
Bryce Douvier led the Islanders (16-4, 7-1) with 16 points and nine rebounds. Rashawn Thomas added 14 points.