The American shot seven shots on Sunday to finish three shots from compatriot Matthew Wolff and record a seventh consecutive top 10 on the Tour.
“It’s a little emotional for me because I did something a little different; I changed my body, I changed my mindset in the game and I could achieve a victory while playing a completely different style of golf, “DeChambeau told reporters.
“It’s pretty amazing to see this and I hope it’s an inspiration to a lot of people that if they do it, they can do it.”
Off the tee, DeChambeau’s game was punctuated by long and powerful drills, with an average of more than 350 yards on two measured holes.
He was trailing three shots before the fourth lap, but a closing 65th – his lowest of the weekend – saw him overtake Wolff on the final day.
The Detroit Golf Club event was held behind closed doors for the fourth time since the PGA Tour resumed in June.
DeChambeau’s victory was marked by a passionate exchange of words with a cameraman on Saturday as he played a stray bunker hit on the seventh hole.
After the round, DeChambeau asked why the cameraman “literally looked at me all the way” to the next tee, which he said “hurt (his) image”.
He said about the incident on Sunday: “I respect everyone, I think people took it the wrong way and I’m sorry I did it.
“I just want to provide the best entertainment here. I just felt like a minute of filming myself was a little weird. But we talked about it and there was no problem, no problem.”
The victory in Detroit was DeChambeau’s first since 2018.
Time will tell if this revamped game will pay off among the majors, where its best result to date is a tie for 15th place at the US Open in 2016.
While the Open was canceled in the middle of the coronavirus epidemic, the first major of the year should be the PGA championship postponed to San Francisco on August 6.