The former Colorado State University golfer posted rounds of 65-68-67 for a 13-under-par 200 total, which was good for a five-stroke victory.
Arp (pictured), a former CGA Public Links champion, made 16 birdies and an eagle — on the 352-yard, par-4 13th hole at Grand Canyon University Golf Club — for the three rounds.
The win was worth $6,400 to the 28-year-old, who had missed his first three cuts on the Gateway Tour in 2016.
Another former CSU golfer, Cameron Harrell of Colorado Springs, tied for 10th place on Thursday, going 67-76-70 for an even-par 213 total, earning $1,450.
Elsewhere on the mini tours, former CSU women’s golfer Emily Roering finished eighth in a Cactus Tour event that ended on Wednesday in Litchfield Park, Ariz. She carded rounds of 72-87-70 for a 13-over-par 229 total. That was good for $625 in prize money.