The 22-year-old American defeated Andres Gonzales with a five-foot par putt on the second playoff hole at Canterbury Golf Club in Ohio. DeChambeau and Gonzales both birdied the par-4 18th on the first extra hole to eliminate Nicholas Lindheim and Argentina's Julian Etulain.

"It's a big patience test for me, and I think I passed," said DeChambeau, who shot a one over 71 in windy conditions to tie Gonzales (68), Lindheim (66) and Etulain (67) at seven under 273.

"Not easy with the wind up, and the rough up. It was a brutal test. The U.S. Open definitely helped me a little bit, especially with how long the rough was, and being comfortable with hitting wedge shots around the greens.

Bryson DeChambeau punches the air after chipping close at the 18th hole to get his par and win the play-off. PHOTO: Gregory Shamus/Getty Images.

“But the good thing is the greens were receptive when hitting irons in so you were really able to throw darts at pins."

DeChambeau pocketed $180,000 for the victory – his first since turning professional earlier this year.

The 2015 NCAA and U.S. Amateur champion now heads the list of players looking to seek promotion to the PGA Tour by finishing in the top-25 on the money list for the four-event Web.com Tour Finals series.

DeChambeau was up and down in the closing holes but held his nerve to reach the play-off. He birdied the par-5 16th, three-putted for bogey on the long par-3 17th but closed with a par to reach the playoff.

"For some reason I'm able to just let that go and focus," DeChambeau said "Really what that does is allow me to just say OK, it's gone, it's in the past, and move forward. I don't hold it up or build it in me. I just ease out of it. I think that's the most important thing that I stuck with it. Eventually I got a couple to fall, one on 16, and unfortunately on 17 I three-putted. But on 18 I clutched up."

Gonzalez earned $74,667 to also wrap up a tour card after finishing 154th in the FedEx Cup standings.

Rod Pampling had back-to-back 68s over the weekend to finish in the top-10. PHOTO: Getty Images.

"Main objective accomplished," Gonzalez said. "It's only disappointing when you come this close. I had some good looks coming down. I played really solid the whole week. I kept the ball in front of me a lot, which is what you need to do here. ... I'm pleased. I'm excited. I'm sure I'll be more excited after I get losing out of my mind."

Queensland’s Rod Pampling (68) and Victoria’s Cameron Percy (70) were the best of the Australians finishing T10 at four under, just three strokes out of the playoff.

Stuart Appleby (T16), Brett Drewitt (T28), Cameron Smith (T28) and Rhein Gibson (T28) doid their chances of making the Tour Finals series top-25 no harm with solid performances.