There’s not a ton of tinkering going on at presently soggy TPC Craig Ranch where Monday was wet and Tuesday was a washout. With it being the week before a major championship and the heart of the season, most players are committed to dancing with the one that brought them and are only soliciting the tour trucks for spec checks and regripping.

Perhaps most interestingly this week, Jordan Spieth has switched from a previous generation of the Titleist Pro V1x into the current iteration of the golf ball (Exhibit A: The photos of Spieth’s caddie, Michael Greller holding up the wares below).

Check out all our photos from the Byron Nelson!

Matt Kuchar continues his flatstick experimentation as he looks to find his form on the green. Bettinardi built him a couple of long-neck center-shafted blades to tinker with. Face-on view of one of the models below, and more photos here.

More of what’s up with major OEM staffers, below.

Titleist

Sean O’Hair is testing a TSi2 (10 degree) driver and TSi2 (15 degree) fairway.

Per Titleist, Spieth offered this about his switch into the new Pro V1x

“I’m trying to optimize launch conditions through the bag. For me, the 2021 Pro V1x, I get more spin around the greens. It’s softer, spinnier around the greens with my short game shots. And then when I went up the bag, I started to get a little bit higher launch, but it didn’t add spin in the long clubs. It just added ball speed and launch. So it’s a little higher window, but it just looks like it’s screaming through the air. And then from the 7-iron on down, I didn’t see much difference in the full shots, just like I said more action around the greens.”

“I’m trying to just hit optimal windows and if I can gain – really, in my long clubs – just a little bit better peak height with a little bit faster ball speed, it actually helps fill my gaps a little bit easier. And then it’s just coming down – it has the potential to come down a little bit softer, which is obviously important. But I’m not seeing a massive difference through kind of that mid iron into short iron. And I still can hit each shot that I want to with the scoring clubs. So being able to tee off and all you do is change the ball and it’s actually in a similar window that’s going 3-4 yards further, that’s nice. And then when I get to the scoring range clubs, I feel like if anything, I just have the ability to hit an even softer shot if I want to. But the rest of them were all still there.”

 

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And while Titleist is mum on any further details, there is this…

There’s only one chance to make a first impression, and we’d say it went well.
@JordanSpieth and @WillZalatoris got a sneak peek at some new irons earlier this week and gave them a test spin. Their feedback… ?? pic.twitter.com/03npRpmsgy

— Titleist (@Titleist) May 12, 2021

Callaway

Sam Burns had set of raw Apex MB irons built for testing.

Talor Gooch is testing a 15-degree Epic Speed Triple Diamond with a Mitsubishi Diamana D+ 80 TX shaft.

Jamie Lovemark is testing a new Epic Speed Triple Diamond LS (10.5@10 degrees) with an Oban HB Kiyoshi 05 shaft.

Wesley Bryant added a prototype full-face 58-08C (@59 degrees) MD5 wedge to his arsenal.

TaylorMade

Beau Hossler switched into a SIM2 Max (12 degrees).

Daniel Berger (non-staffer) added a 15-degree SIM2 Max to his arsenal.

Making his pro debut, amateur Pierceson Coody had this combo set built: P790 (3), P7MC (4-6), P7MB (7-PW).

Non-staffer Rory Sabbatini added a SIM2 driver (9 degrees) and P7MC to his bag (5-PW).

Others, free agents

Rickie Fowler returned to the Scotty Cameron with “Cameron” rather than “Rickie” at the Wells Fargo Championship, but this is the first good look at the flatstick we’ve gotten since the switch.

Daniel Berger was spotted testing a Titleist TS3 with a Ventus Black shaft.

Russell Knox was spotted testing an Axis1 putter.

In a pretty wild story we’re looking for more information on, notorious gearhead Chris Baker is rumored to be putting a set of irons belonging to Cobra rep James Posey in play. Incidentally, Baker is also testing a Kali White shaft.

Free agent Dominic Bozzelli is testing a Titleist TSi3 driver (9 degrees).

James Hahn is reportedly testing a number of shafts: prototype Aldila in a fairway wood, and Mitsubishi MMT in a hybrid and long iron.

PXG staffer Danny Lee switched out of Project X 6.5 and into KBS Tour V 125 shafts (5-PW) and KBS TGI 110 in 3 and 4-iron.

Tom Lewis has moved back into KBS S Taper 125 in his full set. He was playing Nippon 125’s in his irons and a Fujikura Ventus Black 115 HB in his Srixon ZX5 3-iron.

Check out all our photos from the Byron Nelson!