Equipment
Spotted: Prototype Mizuno driver on the LPGA Tour
This week, GolfWRX was out at the LPGA Tour at the FM Championship to get some WITB photos from some of the players there. We know the LPGA players always have some very cool club setups and clubs in their bags, and this week they didn’t disappoint! We spotted Jiwon Jeon with this prototype driver from Mizuno in the bag with very minimal markings other than the “prototype” text near the front weight.
This new driver features three weights on the head for a good amount of adjustability. There is a weight up near the face that we would believe can be used for reducing spin when you add a heavier version there. Mizuno has added a weight far back in the head that is usually used to increase launch, spin, and forgiveness when you shift a heavier one to that spot. The final weight is down near the hosel, very close to the hosel screw, which has been traditionally used to help the play rotate the face closed at impact and get the ball started off on a more left line.
This prototype looks to be using the same Mizuno adjustable hosel system as the current driver, but the numerals “o131” are printed there. I don’t know if that is a version number or has some designation on the loft or other specs of this head. Mizuno looks to have pushed some weight back in the head, as you see that extension on the sole at the back of the head. We have seen this done on other drivers, and it is usually to help with aerodynamics and pushing weight low and back on the head to optimize stability.
From address, this prototype looks clean without any markings or alignment aids on the crown. The shape to me is a little different from the current Mizuno drivers, as the back looks to be a little more tapered and less round. The current ST models look more round and bulbous to me, and this looks a little more traditional when compared to other brands. Mizuno isn’t sharing any details on this one yet, so everything we are going on is just speculation, but it could be a good look as to where Mizuno is heading in their next driver line!
- Check out the rest of our photos from the LPGA Tour’s 2025 FM Championship
Neal Shipley was the first to admit that he enjoyed his food while in college. But since his days at Ohio State, he’s slimmed down and earned a PGA Tour Card.
That hasn’t stopped him from having fun with his wedge stampings, though it’s led to some misunderstandings.
On the 54 (degree), we have ‘Big Fudge,'” Shipley told GolfWRX. “It was supposed to be ‘Big Fridge,’ so this happened a little while ago. ‘Big Fridge’ was a nickname between my college teammates and I, with ‘fridge’ meaning stomach, a big stomach.
“We told the Ping guys to put … ‘Big Fridge’ on it, and I think maybe some bad cell service or something, and they thought I said ‘fudge,’ so they put fudge on it.”
On Shipley’s 50-degree he also continues the food theme, this time with his go-to order at the “Golden Arches,” and his stamping “DONS 7.”
“The number 7 meal, the two cheeseburger meal, that was my McDonald’s order, back when I would have McDonald’s frequently,” Shipley shared.
At GolfWRX, we are a community of like-minded individuals who all experience and express our enjoyment of the game in many ways.
It’s that sense of community that drives day-to-day interactions in the forums on topics that range from best driver to what marker you use to mark your ball. It even allows us to share another thing we all love – buying and selling equipment.
Currently, in our GolfWRX buy/sell/trade (BST) forum, @raw10628 has a L.A.B. DF3 putter and Masters putter cover up for grabs.
From the listing: “Some great items here today, time to thin out and make room for next set of gear. All prices include shipping.
LAB DF3 Purple 33.5” 68° lie with TPT – $725. LAB Masters release DF3 cover – $150.”
To check out the full listing in our BST forum, head through the link. If you are curious about the rules to participate in the BST Forum, you can learn more here: GolfWRX BST Rules
Driver: Ping G440 LST (9 degrees)
Shaft: Accra TourZ Green 5-M4
3-wood: Ping G440 Max (15 degrees)
Shaft: Accra TourZ Green 6-M4
5-wood: Ping G440 Max (19 degrees @18)
Shaft: Accra TourZ Green 6-M4
Hybrid: Ping G440 (23 degrees)
Shaft: Oban Isawa Red Hybrid Shaft 04 Flex 70 Gms
Irons: Srixon ZXi7 (5-P)
Shafts: Aerotech SteelFiber Private Reserve i80
Wedges: Cleveland RTZ (50-MID, 54-FULL, 58-MID)
Shafts: Aerotech SteelFiber Private Reserve i105
Putter: L.A.B. Golf OZ.1i
Shaft: ACCRA Putter Shaft
Grips: Golf Pride Tour Velvet
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Charles Schwab Challenge Tour Report: MacIntyre, Åberg and Spaun all switch putters, TaylorMade launches new Spider
Details on J.J. Spaun’s surprise putter switch
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Photos from the 2026 Charles Schwab Challenge
PGA Championship Tour Report: Fitzpatrick, Koepka among big-name putter switches for Aronimink
Photos from the ShopRite LPGA
Maria Torres WITB 2026 (June)
Driver: Ping G440 LST (9 degrees) Shaft: Accra TourZ Green 5-M4 3-wood: Ping G440 Max (15 degrees) Shaft: Accra TourZ Green 6-M4 5-wood: Ping G440...
Eric Cole WITB 2026 (June)
Driver: PXG Lightning Tour Max (9 degrees) Shaft: Project X Titan Yellow 70 TX 3-wood: TaylorMade Qi4D (15 degrees) Shaft:...
Si Woo Kim WITB 2026 (May)
Driver: Callaway Quantum Triple Diamond (8.5 degrees) Shaft: Fujikura Ventus Black 6 X Mini driver: Callaway Paradym Ai Smoke Mini...
Wyndham Clark’s winning WITB: 2026 CJ Cup Byron Nelson
Driver: TaylorMade Qi4D (10.5 degrees) Shaft: Project X Titan Yellow 60 TX 3-wood: TaylorMade Qi4D Tour (15 degrees) Shaft: Project...
The Truth Network
Sep 4, 2025 at 12:38 pm
This is a POS anyways.
P
Aug 29, 2025 at 11:59 am
That’s D131 not O, as in Driver.
Duh
Emily
Aug 29, 2025 at 6:33 pm
LDL?
Moe Greene
Aug 31, 2025 at 10:24 pm
Oh man, good to call that out and to be angry about it.
I bet the writer might commit seppuku to ask forgiveness from their family and their ancestors.