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The Wedge Guy: St. Andrews — Where my wedge work began

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Having the Open Championship at St. Andrews this week is special to me, and a story I read yesterday about Justin Thomas and his wedges is the reason why.

It seems “Bones” McKay has suggested to Justin Thomas that he carry two lob wedges this week, one with low bounce for the tight fairway lies, and one with a higher bounce for his bunker shots. Yes, the turf at St. Andrews is that challenging. I experienced the same challenge when my late brother and I made a trip to Scotland in 1990 – over 30 years ago.

But it’s not just at St. Andrews, but on nearly every course everywhere. You can face all kinds of lies and execute all kinds of swings every round you play, right? But it was there in Scotland that I found my off-the-shelf sand wedge was just not getting it done from those tight fairways. So, on a tour of Auchterlonie’s Golf Shop, I saw a grinding wheel and had an inspiration. They agreed to let me use the grinder.

I went back to the hotel and retrieved my sand wedge, and began work on the sole design I subsequently patented…

First, I ground much of the bounce off the back of the sole, taking it down to what I later learned was only about 5-6 degrees. Then, I ground a very aggressive high bounce on the front quarter-inch or so of the sole, removing metal all the way up to the first groove as I remember. Of course, that made the leading edge and offset look very strange, so I ground off some of the bottom of the hosel to make it look at least presentable.

As you can imagine, removing that much metal made the swingweight drop like a rock, so my solution was to pack lead tape on the back of the clubhead until I had it back up to about its original D4-5 swingweight.

The result of my very first work on wedges was very impressive. The new “dual bounce sole” I had created proved very adept at the tight lies around the greens, but also totally functional from the bunkers. And the added lead tape higher in the clubhead produced noticeably more penetrating trajectories and spin like you wouldn’t believe.

Upon return to the States, I purchased several major brand wedges and took a more sophisticated approach to fine-tuning this concept, welding material to the sole and then grinding and polishing until I had it right. Once I had it where I wanted, I filed my patent application, and in 1994 was awarded “U.S. Patent #5,301,944 – Golf Club Head With Improved Sole”.

For the past thirty years, I’ve been constantly tweaking on that sole design, improving the concept ever so slightly with each iteration through wedges I’ve designed for Merit Golf, Reid Lockhart, EIDOLON, SCOR, Ben Hogan, and now Edison Golf. And with each of those wedges, I’ve also increased mass in the top half of the clubhead to optimize gear effect. And that has been proven to make wedges more forgiving, deliver improved spin and more penetrating trajectories — and to make them deadly accurate with distance control, even on your slight misses.

While today’s post is not intended as any kind of promotion for my work in wedge design, the memories of that trip with my late brother — and of my inspiration to move on from putter design to tackle the wedge category — have all come flooding back with The 150th Open Championship being played at St. Andrews and the interesting story of a tour player, his caddie, and his wedges.

I hope you all can get plenty of time in front of the TV this weekend to witness how and where this wonderful game has been played for hundreds of years. And I hope all of you will find a way to make this pilgrimage to the birthplace of golf.

It just might change your life — it certainly did change mine.

Terry Koehler is a fourth generation Texan and a graduate of Texas A&M University. Over his 40-year career in the golf industry, he has created over 100 putter designs and dozens of wedges. In 2014, he put together the team that reintroduced the Ben Hogan brand to the golf equipment industry with his TK 15 wedges and Ft. Worth 15 iron designs. Since receiving a U.S. Patent for his “Koehler Sole” in the early 1990s, he has been challenging “conventional wisdom” in the wedge category. In addition to inspiring multiple companies to emulate this sole technology, the performance of his wedge designs have stimulated all other companies to reposition some mass toward the top of the blade in their wedges. Terry is retired from his role as Chairman and Director of Innovation for Edison Golf, and remains active in the industry as an independent designer and consultant.  But his most compelling work is in the wedge category. Since he first patented his “Koehler Sole” in the early 1990s, he has been challenging “conventional wisdom” reflected in ‘tour design’ wedges. The performance of his wedge designs have stimulated other companies to move slightly more mass toward the top of the blade in their wedges, but none approach the dramatic design of his Edison Forged wedges, which have been robotically proven to significantly raise the bar for wedge performance. Terry serves as Chairman and Director of Innovation for Edison Golf – check it out at www.EdisonWedges.com.

1 Comment

1 Comment

  1. geohogan

    Aug 5, 2022 at 7:52 pm

    “Of course, that made the leading edge and offset look very strange, so I ground off some of the bottom of the hosel to make it look at least presentable.”

    I can relate.
    Cant stand offset. After bending all my irons to zero offset, there was so much bounce to grind away and so much lead tape to add.

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Testing Lorem Ipsum

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What is Lorem Ipsum?

Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry’s standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.

Why do we use it?

It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using ‘Content here, content here’, making it look like readable English. Many desktop publishing packages and web page editors now use Lorem Ipsum as their default model text, and a search for ‘lorem ipsum’ will uncover many web sites still in their infancy. Various versions have evolved over the years, sometimes by accident, sometimes on purpose (injected humour and the like).

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2026 PGA Championship betting odds

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Scottie Scheffler leads the betting ahead of the second major championship of the year, with the World Number One a +345 favorite to get his hands on a second PGA Championship.

Rory McIlroy who won the Masters back in April is a +800 shot to complete half of the calendar slam at Aronimink Golf Club this week, while Jordan Spieth can be backed at +5900 to become a career grand slam winner.

Here is the full betting board for the 2026 PGA Championship courtesy of DraftKings.

Scottie Scheffler +345 – (Check 0ut his WITB here)

Rory McIlroy +800 – (Check out his WITB here)

  • Jon Rahm +1300 
  • Cameron Young +1500
  • Bryson DeChambeau +1700
  • Xander Schauffele +1850
  • Matt Fitzpatrick +1950
  • Ludvig Aberg +2000
  • Tommy Fleetwood +2600
  • Collin Morikawa +3500
  • Brooks Koepka +3900
  • Justin Rose +4300
  • Russell Henley +4600
  • Si Woo Kim +4700
  • Justin Thomas +4800
  • Robert MacIntyre +5300
  • Patrick Cantlay +5300
  • Viktor Hovland +5400
  • Tyrrell Hatton +5500
  • Jordan Spieth +5900
  • Sam Burns +6000
  • Hideki Matsuyama +6200
  • Adam Scott +6400
  • Rickie Fowler +7000
  • Chris Gotterup +7400
  • Patrick Reed +7400
  • Min Woo Lee +7800
  • Ben Griffin +8000
  • Sepp Straka +8400
  • Shane Lowry +9000
  • Akshay Bhatia +9200
  • Maverick McNealy +9200
  • Joaquin Niemann +9200
  • Jake Knapp +9200
  • Jason Day +9600
  • Kurt Kitayama +10000
  • J.J. Spaun +10000
  • Harris English +10500
  • Nicolai Hojgaard +11000
  • Gary Woodland +11000
  • David Puig +11000
  • Michael Thorbjornsen +12000
  • Jacob Bridgeman +12000
  • Keegan Bradley +12500
  • Corey Conners +14000
  • Alex Fitzpatrick +15000
  • Sungjae Im +15500
  • Sahith Theegala +15500
  • Harry Hall +15500
  • Alex Noren +16000
  • Thomas Detry +16500
  • Marco Penge +16500
  • Kristoffer Reitan +17000
  • Alex Smalley +17000
  • Wyndham Clark +17500
  • Sam Stevens +17500
  • Keith Mitchell +17500
  • Daniel Berger +18500
  • Ryan Gerard +20000
  • Nick Taylor +20000
  • Rasmus Hojgaard +21000
  • Dustin Johnson +21000
  • Pierceson Coody +23000
  • Aaron Rai +24000
  • Jordan Smith +24000
  • Angel Ayora +24000
  • Bud Cauley +25000
  • Matt McCarty +26000
  • Jayden Schaper +26000
  • Brian Harman +27000
  • Taylor Pendrith +27000
  • Ryan Fox +27000
  • J.T. Poston +27000
  • Cameron Smith +29000
  • Ryo Hisatsune +29000
  • Michael Kim +29000
  • Max Homa +29000
  • Denny McCarthy +29000
  • Tom McKibbin +30000
  • Rico Hoey +32000
  • Matt Wallace +32500
  • Ricky Castillo +33000
  • Haotong Li +33000
  • Michael Brennan +34000
  • Max Greyserman +36000
  • Stephan Jaeger +37500
  • Christiaan Bezuidenhout +37500
  • Rasmus Neergaard-Petersen +39000
  • Aldrich Potgieter +40000
  • Andrew Novak +42000
  • Patrick Rodgers +42500
  • Daniel Hillier +42500
  • Max McGreevy +46000
  • Billy Horschel +48000
  • Chris Kirk +48000
  • Ian Holt +49000
  • Casey Jarvis +49000
  • William Mouw +50000
  • Steven Fisk +50000
  • John Parry +50000
  • Nico Echavarria +52500
  • Garrick Higgo +52500
  • John Keefer+55000
  • Matthias Schmid +57500
  • Austin Smotherman +57500
  • Sami Valimaki +60000
  • Andrew Putnam +60000
  • Lucas Glover +62500
  • Daniel Brown +62500
  • Jhonattan Vegas +75000
  • Emiliano Grillo +80000
  • Mikael Lindberg +85000
  • Adrien Saddier +100000
  • Bernd Wiesberger +100000
  • Elvis Smylie +110000
  • Stewart Cink +130000
  • Kota Kaneko +130000
  • David Lipsky +150000
  • Chandler Blanchet +150000
  • Andy Sullivan +150000
  • Joe Highsmith +180000
  • Adam Schenk +200000
  • Travis Smyth +200000
  • Davis Riley +225000
  • Martin Kaymer +400000
  • Brian Campbell +400000
  • Padraig Harrington +450000
  • Kazuki Higa +450000
  • Jordan Gumberg +450000
  • Ryan Vermeer +500000
  • Austin Hurt +500000
  • Tyler Collet +500000
  • Timothy Wiseman +500000
  • Shaun Micheel +500000
  • Y.E. Yang +500000
  • Michael Block+500000
  • Mark Geddes+500000
  • Luke Donald+500000
  • Bryce Fisher+500000
  • Jimmy Walker +500000
  • Jason Dufner +500000
  • Jesse Droemer +500000
  • Jared Jones +500000
  • Garrett Sapp +500000
  • Francisco Bide +500000
  • Zach Haynes +500000
  • Paul McClure+500000
  • Derek Berg +500000
  • Chris Gabriele +500000
  • Braden Shattuck +500000
  • Ben Polland +500000
  • Ben Kern +50000

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Tour Photo Galleries

Photos from the 2026 PGA Championship

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GolfWRX is on site for the second major of 2026: The PGA Championship from Aronimink in Newtown Square, Pennsylvania.

The tournament’s location, just outside Philadelphia, and its status as a major championship mean GolfWRXers are in for a treat: WITBs from a strong field, custom gear celebrating the PGA Championship, and the rich culture of the City of Brotherly Love — we have noted a relative absence of cheesesteak-themed items thus far this week, but most of the rest of the usual suspects are well represented.

Check out links to all our photos below.

General Albums

WITB Albums

Pullout Albums

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