In case you missed it, here is a link to part 1, where I explain why we might want to look for pitcher’s outside of the baseball world. Part 1 also looked at the antropometric assessment that I think would be valuble.

Mobility

Some of the hardest throwers in the world use extreme ranges of motion.  They use this extra time that their mobility allows them to ramp up the speed needed to light up a radar gun.  The goal here is to get an idea of how mobile an athlete is in certain positions that are critical to an effective delivery.

Here are the important, repeatable, and quick mobility assessments that I would use:

1. Shoulder External Rotation:  This measurement has to be assessed.  The ability to lay the arm back is vital to develop speed. 

The thing that I don’t like about testing shoulder ER is how in accurate it is.  The scores you get from person to person will differ on the way that the test is implemented.

A simple fist-to-fist test might be good enough here to see if someone has enough external rotation to at least get started. 

• Field goal pose: This stretch across the pec can give pitchers a lot of time to create power.  Here’s a great example of what I am talking about from Aroldis Chapman.

The static version of this test has the athlete stand in a goal post pose.  Shoulders and elbows at 90 degrees.  Then you ask them to pinch their shoulder blades to see how much horizontal abduction they can produce.  Ideally, we can see some space between their vertical forearms and their head.  Try to cue them to keep their abs slight braced so that we don’t get too much low back activation.

3. Seated Rotation: Here we get a static assessment of their ability to dissociate their hips and trunk.  In a seated position with something like a soccer ball or foam roller between their knees we simply see how far they can rotate their upper body while the lower body stays completely still.

Figure 3 Credit – IFAST

4. Standing Splits: How are apart can an athlete walk their feet apart in the frontal plane while keeping their hands on their hips.  The ability to abduct the legs is important for pitching.  Not everyone needs to have a huge stride length but it’s nice not to be restricted by mobility.  The score of this test can and should be normalized based on their leg length.  Someone with long legs can have a high absolute score but still have poor adductor mobility.

Physical/Athletic Abilities

Here’s where we look under the hood.  The anthropometrics and mobility give us a sense of the athlete’s frame and what kind of positions they can achieve while these athletic tests give us an idea of how much power they can express.

Based on the same criteria (important, repeatable, and quick) here are the athletic tests that I would use to assess an athlete’s physical ability to throw hard

1.Broad jump: This test is the best because it’s so simple.  Everyone has tried it before and there’s no way to cheat it.  The result of one this one test can provide us with a couple of cool metrics that can give us more insight.

• Relative Jump Distance to standing height
• Absolute Power: take body weight into consideration and calculate power

Here’s an example of how this might look.  This athlete had the 8^th best jump on the team but when it came to power, he ranked 5^th.

2. Short Sprint:  Tremblay et al. found that a 10-meter dash was the best predictor of throwing velocity for U15 group.  This would require electronic gate timers for an accurate measurement.  If I didn’t have gate timers, I’d pick a 30-meter dash.  It’s long enough that we don’t need gate timers and its short enough that we are only focusing on the athlete’s ability to accelerate.

This simple equation can add some valuable insight to how much momentum, in the form of kinetic energy, each athlete can produce.  Throwing is all about transferring momentum from the body to the ball.  How efficiently this momentum is transferred what mechanics are all about.  But if the body can’t produce momentum in the first place it doesn’t matter how efficiently its transferred.

Here’s what it would look like on a printout sheet for the athlete and coach

Here we see a big athlete run one of the slower times on the team but since he was one of the heaviest, he shot to the top of the list in the power category.

3.Grip Strength: In the same Trembly study, grip strength was the best predictor of throwing velocity for both the U11 and U13 age groups. 

To me, this is the simplest and safest way to get an idea of how strong someone is.  If we can test the grip with the arm in different positions we can screen for potential injuries.  Testing at 90/90 and “Lay-Back”.

4. Lateral Jump: The #1 predictor of throwing velocity from my own thesis.  It does take a couple of tries to figure it out for some athletes but it’s pretty simple.  Here I am over ten years ago demonstrating it.  https://www.youtube.com/watch?v=e2WreUSXvbU

5. Backwards Med Ball Throw: The #2 predictor of throwing velocity from my study.  This one also requires a bit of a learning curve.  Figuring out the optimal time to release the ball is vital in getting an accurate score.  Letting go of the ball too soon or too late will reduce their result even if they are producing a lot of power.

It acts as a bit of screen in regards to their coordination.  If they can’t figure out when to release a medicine ball with two hands while moving at a moderate speed, they are going to have a real tough time figuring out when to release a baseball from one hand moving at incredibly fast speeds.

I like a 6 lbs ball and as reference Nate Pearson can launch it 73.5 feet!!!

Throwing

We of course have to see them throw.   Establishing their current “level” of throwing is crucial.  Throwing is tough to quantify making it harder to measure.  Due to its speed, complexity, and variety.

Of course, we can use our coach’s eye.  If you’ve been around the game for a long time, we just know good throwing when you see it.  However, two coaches will often disagree.

In this hypothetical situation that I’m describing I think using these defined levels of throwing ability presented by Southard et al 1998 would do the trick:

1. exhibited simple arm and elbow ex-tension with little or no segmental lag.
2. displayed a lag of the hand relative to the forearm but no lag of the fore- arm relative to the upper arm.
3. displayed segmental lag of the forearm and hand with little or no lag of the upper arm relative to the trunk. Throwers placed in the highest level,
4. displayed segmental lag of the upper arm relative to trunk, forearm relative to upper arm, and hand relative to forearm.

Segmental lag is the distal segment lagging in time and displacement behind its proximal neighbor.   In the study, segmental lag was determined by the relative time to peak velocity for each segment. 

While this system is still somewhat subjective it at least provides a framework that provides more context.

What’s Next

If you can gather all that information, you can then start to make educated decisions and a better plan about who has potential and how you can help them realize that potential.  That will be in part 2

References

The movie “Million Dollar Arm” was a feel-good story centered around a sports agent trying to find pitching talent in a country where baseball is barely played at all in an attempt to find “a diamond in the rough”.  While watching, I couldn’t help but devise a set of tests and assessments that could have helped do a better job of identifying potential talent when it comes to throwing a baseball really, really hard.

The types of assessments that I am proposing would not make for good entertainment to the general population and would inevitably be cut from the movie.  But if you’re reading this article these nerdy details appeal to you.  So, unlike the movie where they only assess throwing, I am going to look at 3 additional yet important categories and tease out some important physical traits that are important to success on the mound.

1. Anthropometrics
2. Mobility
3. Athletic ability

Before we dive into these categories let’s first explore the reason why we would want to look for throwers who don’t actually play baseball

Why Look for Throwers Outside of the Baseball World?

We want the biggest talent pool to draw from if we as the baseball world want the best of the best.  If we only look at athletes who currently play baseball our talent pool is shallow.  Since humans are designed to throw there’s potential to find premiere athletes who can launch a baseball out of their hand on every corner of this planet.

Looking overseas like they did in the “Million Dollar Arm” presents a lot of potential to deepen this talent pool.  We should however maximize what we have domestically by developing grassroots and scouting into other sporting domains.   While Baseball is immensely popular its numbers are dropping and not all of our best athletes are given baseball opportunities.

The high cost of travel baseball isn’t doing the sport any favors either when it comes to maximizing the number of participants.

Here are some situations where this might apply:

• Rural areas: kids that don’t live in towns large enough to play baseball or requires them to travel great distances.
• Inner City: kids that don’t have the chance to play baseball due to lack or teams or maybe the expense of travel teams won’t allow them to participate.
• Athlete’s that Play other sports:  Kids often start playing whatever sport their friends play.

Personally, I have a lot of experience with this last category.  I live in Canada where hockey is very popular and they get the lion’s share of the best athletes. 

Hockey, like most sports now, is played year-round.  This hording of talent has adversely affected the number of athletes who would have been exposed to baseball during the summer past the age of 12 which seems to be when the switch to year-round hockey happens.

Figure 1 – If Tom Glavine grew up Canada today we might have missed out on this hall of famer

Non-Baseball ID Camps

Below you will find the things that I think would be valuable to measure in this type of situation. 

Here’s my criteria for selecting the tests and assessments

1. Important
2. Repeatable
3. Quick & Easy

Anthropometrics

Let’s look at the frame of the athlete.  Certain body proportions and limb lengths aid in throwing a something light really fast (i.e., a 5 oz baseball). 

Let’s quickly look at some of the research done in this area.

Earlier I referenced the fact that humans are built to throw.  A study out of Harvard identified three distinct physical features that gives our species mechanical advantages to throw.  They are:

1. Clavicle Width
2. Long trunk
3. Laterally facing shoulder joints

Here’s some research from other throwing sports as well:

• Cricket: high correlations between ball release speed and shoulder-wrist length and ball release speed and total arm length in cricket bowlers. Glaizer (2000)
• Water Polo: Taller, more muscular athletes with wider arm spans, broader humeri, and wider arms (relaxed and flexed) tended to throw with increased velocity.  Martinez (2015)
• Water Polo: Biacromial breadth (shoulder width) shows a significate correlation to Throwing velocity. Ferragut et al (2011)
• Team Handball: positive correlation of the height and arm span to the ball velocity is consistent with previous studies involving male and female handball players. (van den Tillaar, R 2004, Vila 2012, Zapartidis, 2009)

Cool information but these types of throws aren’t exactly like what we see when we throw a baseball.  In both water polo and handball, the feet aren’t even in contact with the ground while the throw is happening.

With cricket, the elbow has to be straight at ball release.  So, the shoulder to wrist measurement in the Glaizer study makes sense.

*By the way, I don’t think that looking for baseball pitchers in the cricket world worked since the rules of that sport requires that the pitchers, or bowlers as they call them, does not allow any bend in the elbow.  This takes external rotation, or lay-back, out of the equation.  The throwing actions while similar aren’t similar enough*

Baseball Anthropometric Study

I’ve had to rely on information from other throwing sports because there isn’t a ton when it comes to anthropometric studies focusing on baseball.  However, a recent study (Trembly et al.2022) did focus baseball players between the ages of 10 to 22.  They looked at the following measurements and investigated any links between the results and their throwing velocity.

• Weight
• Arm Span
• BMI (body mass index)
• Waist circumference
• Upper arm length & girth
• Forearm length & girth

Researchers only linked height as a positive predictor to throwing velocity for the athletes in the 16–17-year range. 

In this case all of the subjects played baseball.  So, we can’t say that none of these measurements aren’t important when it comes to velocity because, as a group, perhaps they all have long arms, for example, which is part of the natural selection process to play baseball. 

Based on this information, my own “gut”, and my criteria I listed, here is what I’d measure

1. Standing Height
2. Seated Height
3. Half Arm Span
4. Forearm Length
5. Hand Size
6. Shin Length
7. Body Weight

From here I can get an overall idea of the athlete’s size and proportions.  Here’s an example of what I produce with my pitcher’s physical profiling system

Size Now vs Size Future

This kind of information is even more valuable when we are trying to scout young athletes.  The ratio of certain body proportion can give us clues about how big this athlete may get in the future. 

The reason for this is that growth doesn’t happen uniformly across the body.  “Growth Spurts” begin with the feet and hands, followed by the legs, then the arms, and finally the trunk.  Even if we looked at the throwing arm, the more distal segments of the upper limb (hand and forearm) reach adult proportions before the upper arm (Jensen, 1986; Malina & Bouchard, 1991).

The seated to standing height ratio is the most commonly used assessment to estimate where an athlete is in their develop journey, or, how old they are biologically.  An athlete’s biological age can differ from their chronological age by up three years, plus-or-minus.

“A child with a chronological age of 12 years may possess a biological age of between 9 and 15 years” (Borms, 1986)

Figure 2: These 3 athletes are the same chronological age

If a kid looks to have pretty long legs relative to their overall height, then they have more growing.

The Cormic Index

The immature or biologically young athlete would be considered “brachycormic” on the Cormic Index which classifies people, mature and immature, based on their seated to standing height ratio.  If your ratio is more less than 51%, you’d be called Brachycormic.  If you fall between 51 & 53%, you’re a metricormic while those who are more than 53% are labelled at macrocormic.

I bring this up to stress that just because a young athlete has long legs now (brachycormic) doesn’t mean that they will grow out of it.  Different populations tend to fall within certain portions of the Cormic index. 

Africans have a tend to have long legs and are thus more likely to be brachycormic with a ratio of 0.51.  Contrast this with Asian populations who typically considered macrocormic at 0.53 to 0.54 (Pheasant 1986).  Obviously, there are huge variety within each segment of the population but it’s still worth considering in my opinion.

**Getting a look at an athletes fully grown family members can also be valuable – its even better is they are fast twitch type athletes – I guess I will have to add an assessment for the parents too!!**

That’s it for now. In part 2, I will explore the assessment of both mobility and physcial/athletic abilites.

Thanks for reading!!!

Graeme Lehman, MSc, CSCS

Arizona Diamondbacks

Bryce Jarvis is a great example of the average D-Backs pitcher at 6’2″ and 195 lbs

Colorado Rockies

Justin Lawerance at 6’3″ and 213 lbs is right in the middle of this tightly packed cluster of pitchers.

Los Angeles Dodgers

Ryan Pepiot is 6’3″ and 215 lbs. Just slightly heavier and taller than the average.

San Diego Padres

Scott Barlow is 6’3″ and 210 lbs and best represents this team average.

San Fransico Giants

Kyle Harrison and Ryan Walker are both 6’2″ and 200 lbs on the left and right sides respectively. They are somewhere in the middle of this scatter plot.

With the season winding down to a close I wanted to cover the last couple of divisions in this series. Let’s take a look at the “average looking” guys on each staff.

Chicago Cubs

Here’s a scatter plot of their 40-man roster pitching staff

Somewhere in the middle of this graph, you will find a 6’4″ and 215 lbs Julian Merryweather.

Julian is a little heavier than the average so here’s another guy who wasn’t on their roster to start the spring, Jose Cuas. He is anything but average in regard to his story and his delivery. But at 6’3″ and 195 lbs he would also be in the middle of that scatter plot.

This table tells us the average, min, and max for height, weight, and BMI.

Cincinnati Reds

The Reds, as a staff, are 10 lbs heavier than their rivals from the North Side of Chicago. Here are a couple of pitchers that we can consider to be average.

Alex Young at 6’3″ and 200 lbs

Lucas Sims at 6’2″ and 213 lbs

Milwaukee Brewers

Joel Payamps is 6’2″ and 217 lbs. On the active roster, he’s about as average as it gets from a height and weight perspective.

This table has the average, min, and max for height, weight, and BMI.

St. Louis Cardinals

The most “average” height and weight combo I could find was 6’2″ and 215 lbs. There are 3 pitchers, all lefties, on their active roster who share these stats.

Zack Thompson

Drew Rom

John King

Pittsburg Pirates

The Pirates have the biggest staff in the division. Their staff average is 6’3″ and 215 lbs. Mitch Keller and Andre Jackson best represent this average. They are both 6’3″ with Andre being 5 lbs lighter than the average at 210 lbs while Mitch is 5 lbs heavier at 220 lbs.