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Spotted: Callaway GBB Epic Sub Zero “PM440” hits USGA conforming list



Callaway’s GBB Epic Sub Zero driver — the more forgiving, yet deeper-faced option in the GBB Epic driver series — has made waves on professional golf Tours, and it also garnered the most votes in GolfWRX’s Members Choice: The Best Driver of 2017. The retail models measure 460cc, but there’s another 440cc version floating around on Tour in the bag of Alex Noren.

Now, there’s yet another GBB Epic Sub Zero model in existence; a “GBB Epic Sub Zero PM440” is listed on the USGA Conforming Clubs list.20160753

Screen Shot 2017-06-02 at 11.46.02 AM

What could a left-handed Callaway driver named “PM” possibly mean? We’ll go out on a limb and guess that Callaway has made a GBB Epic Sub Zero 440 driver especially for Phil Mickelson, but we will update this story when Callaway representatives provide further insight on the “PM440.”

Update: “It’s a left-handed 440cc version of Phil’s driver,” said a Callaway representative. “It’s a one-off Tour prototype that they built of his driver for him, instead of the standard 460cc head.”

Discussion: See what GolfWRX members are saying about the GBB Epic Sub Zero drivers in our forums

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  1. Barry

    Jun 10, 2017 at 5:28 pm

    I wish they would come to market with that same black/ silver or black/grey color scheme versus the green/ black scheme.

  2. Dave R

    Jun 6, 2017 at 4:22 pm

    Really . A new driver!

  3. @@!!!

    Jun 3, 2017 at 10:35 pm

    Personally I lprefer a smaller head like a SLDR/M1 430/440, 917 D3.

    But I really wish a there was a pic from the address point of view, because that’s really a huge factor of importance I think.

  4. @@!!!

    Jun 3, 2017 at 10:16 pm


  5. Sam

    Jun 2, 2017 at 5:16 pm

    Maybe he’ll be able to hit 10 fairways at the US Open with this thing

  6. Scraping the barrel

    Jun 2, 2017 at 4:21 pm

    Epic fail more like.

    • rebfan73

      Jun 3, 2017 at 8:52 am


    • Mike

      Jun 7, 2017 at 8:07 am

      I like the EPIC Sub-Zero much better than the Taylormade M1 which I thought was a pretty good driver. So for me and many others it is more epic than fail….

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The Nike 2018 Golf Sunglass Collection is here for Spring



Nike is adding five ultra-lightweight new styles for Spring. The shades introduces the brand’s new innovative Nike Course Tint and air pocket technologies, designed for peak performance on the golf course.

Taking a cue from Nike Golf apparel and footwear, The Nike Vision Golf Collection offers golfers traditional style in frames that are suitable for both on-and-off the course wear.

Several of the models feature Nike’s air pocket temple-cushioning technology, which enhances comfort.

Nike Course Tint is designed to block sunlight, highlight form and enhance contours when outdoors. The new tint balances light transmission and intensifies colors to assist in reading greens and amplifying the whiteness of the ball.

Additional features include durable high-tension hinges, innovative cushioning and ventilated rubber nose bridges to reduce fogging. Select styles also include tapered temple arms designed to fit easily under a hat.

Each pair of sunglasses comes equipped with 100% UVA and UVB protection.

The 2018 Golf Collection includes:

Nike Maverick

Nike Outrider

Nike Pivot Six & Nike Pivot Eight


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Jason Dufner WITB 2018



Equipment is accurate as of the 2018 WGC Dell Match Play (3/20/2018).

Driver: Titleist 917D2 (10.5 Degrees)
Shaft: Project X HZRDUS 65 6.5

3 Wood: Titleist 917F2 (13.5 Degrees)
Shaft: Aldila Tour 80 Tour X

7 Wood: Titleist 915F (21 Degrees)
Shaft: Aldila Rogue 125 MSI 80 Tour X

Irons: Titleist 716 Ap2 (4-PW)
Shaft: True Temper Dynamic Gold AMT S400 Tour Issue

Wedges: Titleist Vokey SM7 (52-12F), Titleist Vokey Design (56), Titleist Vokey 2017 Prototype (60)
Shaft: True Temper DG Spinner

Putter: Scotty Cameron Circle T T5S
Grip: SuperStroke PistolGTR Tour

Golf Ball: Titleist Pro V1x


Discussion: See what GolfWRX members are saying about Dufner’s clubs. 

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pga tour

Vijay Singh WITB 2018



Equipment is accurate as of the 2018 Arnold Palmer Invitational (3/13/18).

Driver: TaylorMade M2 2016 (9.5 degrees)
Shaft: TPT Golf

3 Wood: TaylorMade Areo Burner (12 degrees)
Shaft: Fujikura Motore Speeder VC 8.2 Tour Spec X

3 Wood: TaylorMade M2 2016 HL (16.5 degrees)
Shaft: Fujikura Motore Speeder VC 8.2 Tour Spec X

3 Wood: Tour Edge Exotics CBX T3 (16.5 degrees)
Shaft: Fujikura Pro 2.0 Tour Spec 7S

Irons: Mizuno MP-4 (3-PW)
Shafts: Nippon N.S. Pro Prototype

Wedges: Wilson Staff FG Tour PMP (54-11, 59-10)
Shafts: Nippon N.S. Pro Modus 3

Putter: Bloodline R1-J
Grip: Bloodline Grip

WITB Notes: We spotted Vijay testing a few different fairway woods at the 2018 Arnold Palmer, and we’ll update this post when we confirm his decisions.


Discussion: See what GolfWRX members are saying about Singh’s clubs. 

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19th Hole