A brilliant second shot out of the rough on the right-hand side of the fairway set up another birdie on the par-five 17th, and DeChambeau then celebrated wildly after rolling in a four-yard birdie putt at the last which put him level with Rodgers on 18 under.
The 23-year-old, who majored in physics at Southern Methodist University and uses one of the most unique swing methods on the PGA Tour with irons all the same length, is probably the most misunderstood golfer on Tour. "It's a great experience for the future, and I look forward to winning very soon". Stewart is one of his idols, along with Ben Hogan, and DeChambeau honors them both by wearing their trademark Hogan-style hat.
It also gives DeChambeau another connection to former SMU standout Payne Stewart - who won his first PGA Tour title in the Quad-Cities at the 1982 QC event at Oakwood where he also first wore plus-4 trousers. Lamb was 13 under for the final two rounds but was done in by pedestrian efforts in the first two rounds.
An even par final nine hole left him with a respectable 4-under 67, his 43rd sub par round at TPC Deere Run.
"Just got out of position off the tee", he said.
He added: "I can rely on hitting a strong shot into the wind and it's not going to stall".
The 23-year-old Korean closed with a five-under-par 67 to finish on 11-under, two ahead of compatriot Hye Jin Choi, who was bidding to become the first amateur in 50 years to win the event.
Blairgowrie's Bradley Neil is up to seventh in the Road to Oman with earnings of just under £44,000 after recording back-to-back runner-up finishes on the Challenge Tour.
Bryson De Chambeau hits his tee shot on the second hole during the final round of the John Deere Classic. Getty Images
The victory punctuated somewhat of a comeback for DeChambeau. "I knew I would be back".
"I've just been working so hard my whole life to try and do this, and to finally have it happen at the John Deere, where I started pretty much a couple of years ago, is just incredible", DeChambeau told reporters after the event. "When I made that little 6-footer at 10, it was kind of a little momentum boost". After missing eight straight cuts, he has been inside the top 30 each of the last four weeks.
"I love the way he looked out there, " DeChambeau said of Stewart, who died in a tragic plane incident in 1999.
"It's pretty special to have my first win to be here, and it's many thanks to him".
He was thrilled that his victory includes an invitation to the British Open, which starts on Thursday.
And like Stewart, he hopes a win here can launch his career to bigger things.
"It means a lot to have Bryson as a victor because we already have a relationship with him", Peterson said.
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