The victory keeps the Flames postseason hopes alive and moves them to 9-7-1 overall and 5-6 in Southern States Athletic Conference play. The loss drops Southern Poly to 10-4-1 overall and 6-3-1 in the SSAC.
Kiger's goal came just four minutes into the second half at the 49:10 mark on an assist from Chevon Roberts.
The other huge turning point in the match came just a minute later when SPSU's leading scorer, senior forward Emeka Maduka, received a red card, forcing the home team to play a man down for the final 39:43.
The Hornets had a golden opportunity to tie the match late in the second half. SPSU senior midfielder Andre Santos missed a penalty kick wide with 3:43 left in regulation.
Flames keeper Tom Halsall recorded four saves in keeping the clean slate. Hornets goalkeeper Dennis Kramer had three saves in allowing the lone goal of the game.
Lee registered 10 shots, four of which were on goal. Southern Poly had 12 shots in the match, also recording four shots on goal.
The Flames will have to wait and see if they will play again this year. A Southern Wesleyan win or tie over Emmanuel on Saturday night would give Lee the eighth and final spot in the SSAC tournament, set to begin next Saturday.