Updated 2017.2.12

For years, I have expressed concern about how, at foot plant, you often see the same twist in the wrists of pitchers who have had Tommy John surgery.

Kyle Smith

I call this Premature Pronation of the pitching arm side forearm, into or at foot plant, the Tommy John Twist.

Hunter Harvey

Dr. Glenn Fleisig of ASMI has come to agree with me that this is NOT something that ballplayers should be taught to do. As a result, and at my suggestion, he recently advised USA Baseball that they should change their recommendations and STOP teaching ballplayers to point the ball at second base.

Matt Harvey

Why did Dr. Fleisig come to agree with me?

As I explain in my analysis of Matt Harvey's pitching mechanics, the way his wrist and forearm moved during his delivery and, more importantly, the resulting (negative) impact on his arm and its Timing, let me see his injury coming well in advance.

Walker Buehler

Technically-speaking, what I'm referring to is premature pronation of the pitching arm side forearm into, and in the worst cases at or even after, foot plant.

Informally, I refer to this as the Tommy John Twist.

Jose Fernandez

As i discuss at length in my analysis of Jose Fernandez's pitching mechanics, the existence of a pronounced Tommy John Twist...

Jose Fernandez

...was one of the things that enabled me to first predict Jose Fernandez's elbow injury and then predict Jose Fernandez's shoulder problems.

The Tommy John Twist usually results from the use of cues like...

I discuss the technical aspects of this idea, and related problematic movements, in greater detail in these pieces...

Tommy John Surgery Twist

The Tommy John Twist was named after the surgery, not the man.

Tommy John

However, I have recently come across a number of pictures that make me wonder if what got Tommy John's elbow was the same twist.

Tommy John

I'm also starting to wonder if Tommy John is teaching the twist to young pitchers.

Tommy John

This fear is based on a terrifying piece about Tommy John from 2011 that I recently came across.

Wyatt Viles listened to every word Tommy John had to say. The 10-year old from Strong watched John cock his left arm in a throwing motion, then mimicked the motion as best he could, twisting his left hand so the baseball turned from his body, then twisting his hand towards himself as he threw.

What's the big deal?

The phrase, "twisting his left hand so the baseball turned from his body," is a description of the Tommy John Twist.

What Nolan Ryan is Missing

Why won't Nolan Ryan's proposed solution to the epidemic -- throw more -- work?

Because modern pitchers generate velocity differently.

You can see the Tommy John Twist in the picture below that compares Nolan Ryan and Walker Buehler.

Nolan Ryan and Walker Buehler

Into foot plant -- which is the critical moment because that is when the arm typically comes under load -- Nolan Ryan points the ball at third base while Walker Buehler is points the ball at second base.

Walker Buehler

The way Walker Buehler points the ball at second base (or center field) is problematic because he does it by twisting (pronating) his pitching arm side wrist at foot plant.

Walker Buehler

You can see the same twist in the arm of Riley Pint, which is why I question whether he will last as a starting pitcher.

Riley Pint

If he even makes it to the major leagues.

Riley Pint

While ASMI advocates pointing the ball at second base, I believe that is bad advice because, as I explain in my piece on Premature Pronation, and as is backed up by the science behind The Epidemic, pointing the ball at second base will often create a Timing problem.

Riley Pint

That may lead to a short-term velocity boost, but it often does so by overloading the arm and creating problems with the elbow and then the shoulder.

Riley Pint

Predictive Power

As I discuss in my analysis of Matt Harvey's pitching mechanics, the Tommy John Twist was one of the things that alerted me to a problem with his mechanics, a problem that I discussed in advance of his Tommy John Surgery.

Matt Harvey

My understanding of the true nature of the Tommy John Twist allowed me to predict that Walker Buehler wasn't suited to be a starting pitcher.

Walker Buehler

It also allowed me to see Hunter Harvey's elbow problems coming years in advance.

Hunter Harvey

Most recently, my understanding of the problematic nature of the Tommy John Twist allowed me to predict the injury of Lance McCullers.

Lance McCullers

The problem is the Tommy John Twist works by inhibiting the external rotation of the pitching arm, making it late into Foot Plant.

By design.

(W)hen the forearm is pronated, the humerus remains internally rotated. This causes the shoulder to abduct while delaying humeral external rotation. (Davis 2009)

The resulting Timing problem -- which recent research into the epidemic reveals is problematic -- will often produce a quick velocity boost, at the cost of overloading the arm.

Hunter Harvey

Depressingly often, that gets the elbow and then the shoulder.

Other Examples of the Tommy John Twist

Other pitchers who exhibit the Tommy John Twist are shown below.

Matt Cain

Marco Gonzales

Cliff Lee

Ivan Nova

Michael Matuella

Wade Davis

The Alternative to the Tommy John Twist

You don't see the Tommy John Twist in the wrists of dominant and durable pitchers.

Instead, they point the ball at third base (first base for lefties).

Roy Halladay

Tom Seaver

Nolan Ryan

Mariano Rivera

David Price

Justin Verlander

Greg Maddux

ASMI and the Tommy John Twist

ASMI advocates pointing the ball at second base, so how could it be bad?

Well, the Mayo Clinic advocates Flat Arm Syndrome and Timing problems, so I sadly don't see any (positive) correlation between an organization's prominence the wisdom of the mechanics it advocates.

As I discuss at length in my comments on ASMI's pitching mechanics model, the description of the basics of the pitching delivery on Playball.org says...

The throwing hand fingers should be on top of the ball, with the arm working through a down, back and up progression so that the ball is ultimately pointed towards second base.

UPDATE 2016.10.5: I contact Dr. Glenn Fleisig of ASMI who explained to me that this section of the Playball.org website was NOT written by ASMI, but by someone at USA Baseball. He is contacting them to talk about revising it.

However, in an July 2016 communication to a parent on the ASMI web site, Dr. Glenn Fleisig of ASMI did say...

As a lefty, he SHOULD be showing the ball to the second baseman / CF at foot contact. A general description of good mechanics are described on the MLB / USA Baseball website "PlayBall.org" Here is the direct link: web.usabaseball.com/arc/coaches/resources/pitching/biomechanics-of-pitching/

Read more: http://asmiforum.proboards.com/thread/2331/premature-pronation#ixzz4G8mkSUEt

A lefty pointing the ball at the second baseman's position isn't as bad as pointing the ball at second base, but by saying "second baseman/CF" you are implicitly endorsing pointing the ball at second base, which is a problem.

And how could pointing the ball at second base be bad?

I believe the simplest, and least conspiratorially-minded, answer is that, as is also the case with the Mayo Clinic's incredibly troubling advocacy of Timing problems...

  1. It's what (pretty much) everybody teaches.
  2. They making the all too common mistake of assuming that proper pitching mechanics are anything that let you throw hard.

If you're throwing hard, then your mechanics have to be good.

Or so the logic seems to go.

I would argue that assumption has led ASMI to make some questionable statements and support some problematic ideas in the past.

But if those "flaws" reduce the risk of pain...

This may be another example of ASMI letting an assumption take it to a problematic place..

When You Assume...

I came of age in the computer industry. In that world, when you change something and deploy that change, and everything starts breaking, you undo that change, revert the system to the prior state, and figure out what went wrong.

In my opinion, and as I explain in Pitching MRSA,the idea of pointing the ball at second base is a historically recent development.

One that coincides with The Epidemic.

Prudence dictates that we revert all of the recent changes that have been made to how we teaching pitching, starting with the idea of pointing the ball at second base.

We need to see what people got wrong before we ruin another generation of arms.