Allcorn entered Saturday's final round at 1-under-par 143 and tied for 13th place after posting rounds of 71-72 on Friday's opening day. He trailed leader Jeff Rein (68-68--136) by seven strokes going into Saturday's final round.
But Allcorn ripped up the course Saturday, firing a closing round 63, the best score on the course since current PGA Tour pro Bubba Watson shot a 63 en route to winning this same tournament in 2005.
Allcorn got his day started with a birdie on the first hole, but really got unleashed with he aced the par-3, 168-yard fourth hole. He then finished the front nine with an eagle on No. 7, a birdie on No. 8 and a par on the ninth to finish the front at 6-under-par 30.
Allcorn then parred the first five holes of the back nine, but then went birdie, birdie par, birdie to close out his round with a 9-under-par 63.
Allcorn - who won $10,000 for his efforts and moved into second place on the Adams Tour money list - topped a group of four players who finished one shot back at 9-under-par. That group included first-day leader Rein and Allcorn's former Baylor teammate, Jeremy Alcorn of Brownwood.