There were a total of seven stoppages in the four days before officials decided to cut the tournament to 54 holes.
'This one was tough,' said Oberholser, who moved to first on the tour's money list with his $76,500 first-place check. 'I didn't feel in control of my swing at all today. There were a few times when I didn't even know where my clubhead was in my backswing. I felt like I was blindly ripping at it. I know that's going to sound funny, but it's the truth. It was nerve-wracking, but I got it done a lot of different ways.'
Brian Claar and Doug Barron shared second place at 12-under-par 204. Claar shot a 6-under 66 on Sunday while Barron, who was one of four co-leaders after the second round, carded a 3-under 69.
Patrick Moore, already a two-time winner on the Buy.Com Tour in 2002, fired an 8-under 64 to share fourth place with Victor Schwamkrug (67), second-round co-leader Curt Byrum (70), Jimmy Walker (69) and Andy Miller (69). The group tied at 11-under-par 205.
After rain delayed play in the afternoon, Oberholser returned to the fourth hole and began a string of three consecutive birdies.
'Those were huge for me,' he said. 'Fortunately, I missed the greens in the right places. You can get stuff done from in front of the greens, but not from the sides or behind.'
Oberholser joined the leaders with a birdie at the ninth and took sole possession of first when he chipped in for eagle at the par-5 12th, his second eagle in as many rounds at the hole.
He birdied the 14th hole to preserve his second win of the season.
'This was a very difficult week for us. There was no continuity to it, no flow. Start-stop, start-stop. It was tough,' said Oberholser, who won the Canadian PGA Championship in April. 'But there isn't anything you can do about it. It's part of golf. You find something to do. You concentrate on getting ready and you keep plugging.'
Todd Fischer carded a 7-under-par 65 Sunday to finish in a tie for ninth with Mark Wurtz. The duo came in at minus-10.
D.A. Points, the fourth co-leader after the second round, shot an even-par 72 in the final round and tied for 11th at 9-under par.
Final results from the Utah Classic