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Roberto Diaz using Mitsubishi Rayon OT graphite iron shafts in Mexico



At the WGC-Mexico event this week, we’ll see something never seen before: Mitsubishi Rayon graphite iron shafts in play at a Tour event.

Roberto Diaz, a native Mexican who’s currently ranked No. 5 on the Tour money list, is using the company’s OT iron shafts at the Club de Golf Chapultepec. He was fit for the shafts at True Spec Golf in Miami, an international club fitter with U.S. locations in Florida, New York and Ohio. True Spec Golf also built his irons.

Golf Shaft-Type Overview_OT-1

The shafts originated in Japan from the Mitsubishi Rayon “idea lab,” also known as FRANKI (the Japanese word for incubator is “Fooranki”), and they are produced with a process that’s similar to how steel cables are made.

Each OT shaft is created from graphite fibers that are arranged in super-strong bundles and impregnated with resin to create the company’s special “Tow Prepreg.” The bundles are then woven together like a braid. According to MRC, the manufacturing process makes the shafts more resistant to twisting and ovaling.

Diaz is using a 105-gram model of the parallel-tip shafts in X-Flex. He’s also using an MRC Kuro Kage XT 60 (TX-Flex) shaft in his driver.


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  1. KCCO

    Mar 13, 2017 at 10:22 pm

    Seems as if OEMS are getting (hard to call graphite) as it seems there are so many other materials in the actual materials being used to get these shafts to a point of finally satisfying what a player wants from an iron shaft. I had weight issues with a few in past, meaning didn’t follow weight as standard steel shaft irons did going from long iron throughout shafts weighted differently didn’t correlate. That being said there are a few manufactures who have nailed it, at least IMO. I play Fuji MCI-100 limited blacks stiff tipped to stiff plus-ish. I played x100’s previous for longest period of time after trying most iron OEM’s offerings. i.e. KBS C-Taper, Tours, assorted DG’s (still love x100, in black onyx are even better) , Nippon; actually really nice etc. I believe some will be very satisfied the difference a few years has made. I’m not crazy swing speed player either. (105-108) 43.5 driver. I was assured by a great player/player these would be last iron shafts, at least for a while…he was right. Later releases and development may surprise you, give a try.

  2. Adam

    Mar 4, 2017 at 4:09 pm

    Why is a guy from the tour playing in a WGC event?

  3. James

    Mar 2, 2017 at 11:34 pm


  4. Dylan

    Mar 2, 2017 at 8:24 pm

    Great. I’ll take a 105-X, 46in with a .335 tip please. Because ‘merica.

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Titleist AVX golf balls passed the test, are now available across the United States



Titleist’s AVX golf balls first came to retail as an experiment in three markets — Arizona, California and Florida — from October 2017 to January 2018. AVX (which stands for “Alternative to the V and X”) are three-piece golf balls made with urethane covers, and they’re made with a softer feel for more distance than the Pro V1 and Pro V1x golf balls.

After proving their worth to consumers, Titleist’s AVX golf balls are now available across the U.S. as of April 23, and they will sell for 47.99 per dozen (the same as Pro V1 and Pro V1x golf balls) in both white and optic yellow.

According to Michael Mahoney, the Vice President of Golf Ball Marketing for Titleist, the AVX is a member of the Pro V1 family. Here’s a basic understanding of the lineup:

  • AVX: Softest, lowest trajectory, lowest spinning, less greenside spin and longest
  • Pro V1x: Firmer than the Pro V1, highest spinning and highest trajectory
  • Pro V1: Sits between the V1x and the AVX in terms of feel, spin and trajectory, and will appeal to most golfers

Different from the Pro V1 or Pro V1x, the AVX golf balls have a new GRN41 thermoset cast urethane cover to help the golf balls achieve the softer feel. Also, they have high speed, low compression cores, a new high-flex casing layer, and a new dimple design/pattern.

For in-depth tech info on the new AVX golf balls, how they performed in the test markets, and who should play the AVX golf balls, listen to our podcast below with Michael Mahoney, or click here to listen on iTunes.

See what GolfWRX Members are saying about the AVX golf balls

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Andrew Landry’s Winning WITB: 2018 Valero Texas Open



Driver: Ping G30 (9 degrees at 8.8 degrees)
Shaft: Aldila Tour Blue ATX65 TX
Length: 45.25 inches, tipped at 1 inch
Swing Weight: D3

3 Wood: Ping G (14.5 degrees at 15.15 degrees)
Shaft: Project X HZRDUS Yellow 75
Length: 43 inches, tipped 1 inch
Swing Weight: D2

5 Wood: Ping G (17.5 degrees at 17.75 degrees)
Shaft: Project X HZRDUS Yellow 85
Length: 42 inches
Swing Weight: D2

Irons: Ping iBlade (3-PW)
Shafts: Nippon N.S. Pro Modus3 105X
Swing Weight: D2

Wedges: Titleist Vokey SM7 (52-12F and 60-10S)
Shafts: True Temper Dynamic Gold S400 Tour Issue

Putter: Ping PLD ZB-S
Grip: Ping Pistol
Length, loft, lie: 33 inches, 3 degrees, 3 degrees flat

Golf Ball: Titleist Pro V1x

Grips: Lamkin Crossline Full Cord

WITB Notes: Landry tweaked his iron lofts before the Valero; 1 degree weak in his 4 and 5 iron, and 0.5 degrees weak in his 6-PW.


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

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Alexander Levy’s Winning WITB: 2018 Hassan Trophy



Driver: TaylorMade M2 (8.5 degrees)
Shaft: Mitsubishi Tensei CK 60TX

3 Wood: Titleist 915Fd (15 degrees)
Shaft: Mitsubishi Tensei CK 70TX

Hybrid: Titleist 816 H1 (17 degrees)
Shaft: Graphite Design Tour AD DI-95X Hybrid

Irons: Titleist 716 CB (3), Titleist 714 MB (4-PW)
Shafts: KBS Tour C-Taper 120S

Wedges: Titleist SM6 (52-08F),Titleist SM7 (58)
Shaft: True Temper Dynamic Gold Tour Issue

Putter: Odyssey O Works 7
Grip: Odyssey Pistol

Golf Ball: Titleist Pro V1x

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

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19th Hole