Nick Taylor carded a final-round 66 to clinch victory at the Sanderson Farms Championship in Mississippi by a two-shot margin.
The Canadian went into Sunday's session trailing overnight leader John Rollins by four strokes.
However, the 26-year-old sank eight birdies in an impressive last day to finish on 16-under and claim his maiden PGA Tour title.
He finished up two clear of Jason Bohn and Boo Weekley, who shot 69 and 66 respectively to end the tournament on 14-under-par.
Rollins saw his title bid derailed with a bogey-laden back-nine, picking up three blemishes as he finished on 13-under along with Peter Uihlein and Justin Thomas.
