Later, DeChambeau was informed by PGA Tour official Brad Fabel after the fifth hole that he took too long to hit his second shot into the par 5, and another infraction would result in a one-stroke penalty.
"(Fabel) came up to me and told me I had a bad time," DeChambeau said, according to Golf Channel's Will Gray. "And I was like, 'Do you realize I was deciding between laying up and going for it? And we've had struggles the past three holes in a row, hazards and making bogeys and all that. Was that not factored in?'"
DeChambeau was deemed to have exceeded the 40 seconds allotted for his approach shot per PGA Tour regulations. The first golfer in a group to play their approach shot is given 50 seconds.
He made double-bogey on No. 6, his first hole after the warning.
"It's a bit unfair when you've got someone that's behind you, let's say, and they're slower but they're quicker through their process. I get up in the middle of the fairway and I have to wait for them to go, and then I have only my 40 seconds, which is what I'm trying to do everything under," he added.
DeChambeau's pace has been under scrutiny for a while, as he's admitted to doing several pre-shot calculations before hitting the ball. Brooks Koepka called the slow play "kind of embarrassing" after a tournament in Dubai, hinting at DeChambeau's number crunching.
“People call me slow. I call myself quick with the stuff I do," he continued. "A lot of guys out here, they just see it and they hit it. And for me, I don’t want to do that because I feel like there (are) other variables I get hurt on.”