Jacksonville State (9-12, 2-5 Ohio Valley) trailed 66-59 on Corey Waldren's free throws with 1:31 left for Eastern Kentucky (11-7, 3-2).
Rackley hit a pair of free throws with 1:22 left, made a quick steal and hit a 3-pointer six seconds later. He then had another steal at the 50-second mark which he fed to Jamel Hunter for a three-point play. The Gamecocks had scored eight points in 34 seconds for a 67-66 lead.
Hunter added a pair of free throws with 19 seconds left, Ja'Mill Powell made 1 of 2 from the foul line for EKU, and Malcom Drumwright had two free throws for the Gamecocks to cap the scoring with four seconds.