Ott finished with a tournament record score of 25-under-par 263. His total broke Anthony Painter's record of 267, which was set in 1998. Tom Carter, who picked up his second of three wins here last year, tied Painter's mark in that victory.
Brandt Snedeker, who turned pro earlier this summer finished one shot behind Ott at 24-under-par 264 after closing with a nine-under 63.
Tyler Williamson set a new course record with a 12-under 60, but it was only good enough to get him into a tie for third at 22-under-par 266. He was joined there by David McKenzie (64), with Michael Letzig one stroke further back at minus-21.