At the LIV Golf Virginia event, the US Open champion put a set of LA Golf BAD V3-W irons in the bag, and he almost came away with a win. DeChambeau came up two shots shy of the red-hot Joaquin Niemann, posting rounds of 66-69-65.
At the end of the week, the two-time US Open champion explained that he was satisfied with the new addition as he heads to Oakmont.
"Yeah, they felt pretty good. I think there's more optimisation at play, potential optimisation at play, but it's a good start."
He did actually add that he might have to also add in a new driver, which will no doubt be another talking point this week.
"I drove it really poorly for my own standards this week, so I'm going to go work on that. I feel like the driver might have kind of given away this week. I've used it for over three months now and it's time to put a freshy in. It's something I'm going to work on for next week and get ready."
For now though, the irons. They're similar to the Avodas that have been in the bag for the past two seasons; the 5-iron to pitching wedge are all a single length of 37.5 inches
According to reports from the range, DeChambeau would deliberately hit shots off the toe and heel to test the side curve of the ball. Some shots off the heel supposedly flew straight and, given his ball speed, any help on any slight mishit will be huge.
This is a big part of the test as these new irons are similar to his previous irons but the heel part is slightly flatter than the toe and this is where more of DeChambeau's mishits, the weak fade, come from. He generally swings the club from in to out and that will lend itself to more heel strikes.