Equipment
Details on Phil Mickelson’s new Callaway Epic Speed Triple Diamond driver
Phil Mickelson’s Callaway Mavrik Sub Zero has been a mainstay of his bag this season, even with the ebb and flow of the rest of his setup.
The five-time major champion’s surprising ascent up the leaderboard at the PGA Championship has been accompanied by a turnaround in his driving performance. And as those who have checked out our Mickelson WITB already know, Lefty has made a switch at the top of the bag that is aiding his impressive driving performance.
Specifically designed for Mickelson, the driver has a Callaway Epic Speed Triple Diamond head that is 6 degrees set at 5.5, and it weighs a very light 189 grams. It’s outfitted with a 47.9-inch Fujikura Ventus Black TX shaft that is tipped two inches.
(Image via Callaway’s Johnny Wunder)
According to Callaway, Mickelson was pursuing both tighter dispersion at cruising and all-out speeds. He needed to be able to work the club both ways and it has to suit his eye at address, or he wasn’t switching out of his Sub Zero.
Gerritt Pon, Callaway’s senior club performance analyst, and the man who works most closely with Mickelson, said Phil had initially tested an 8.5-degree head set at 6.5 degrees, but it spun too much. Lefty looks for draw spin under 2,000 rpms and sub-2,400 rpm spin on fades.
According to Pon, “When he tested the Epic Speed line there was always something in the mix that didn’t work so we redesigned an Epic Speed head just for Phil with a lower CG and a lower loft (than retail) that supported everything he was looking for.”
Additionally, the 6-degree head sits nearly square at address, which is the look Mickelson likes.
Regarding the nearly-48-inch Ventus, Pon said, “To swing the longer shaft, he’s trying to hit up on the ball a little more than with a normal shaft. He’s creating a lot of loft at impact to launch it high.”
The head design, which features an additional screw in the front of the sole, was the product of an eight-week process CAD and foundry manufacturing.
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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Russell Henley’s winning WITB: 2026 Charles Schwab Challenge
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Charles Schwab Challenge Tour Report: MacIntyre, Åberg and Spaun all switch putters, TaylorMade launches new Spider
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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...
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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...
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MCoz
May 24, 2021 at 9:24 pm
I don’t see it here but that “2 wood” he hit numerous times as a fairway finder was a TaylorMade Original One Mini Driver 11.5*. No wonder the Callaway people directed the conversation away from that.
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