Mark Worrell's delivery gets the best of him
http://tiny.cc/t31t4
Tommy John surgery for this guy. I know that his FIP and k/9 were great in Memphis last year, but he also walked like 4.75/9. I liked the Greene trade because I suspected Worrell was an injury risk. I wonder what Chris O'Leary will have to say...
As per this article, the Cardinals are soon to announce the PTBNL in this deal. I wonder who that will end up being.
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Um....
Is anyone really surprised when any pitcher goes down with an injury?
If Worrell had a “regular” delivery, would he be immune from the risks of arm injury?
Nothing to see here…move along.
by Willie McGee's Twin on Mar 20, 2009 8:06 PM EDT reply actions
If this is sarcasm...
maybe make it a little more obvious? Sorry, but I see too many stupid posts on this board to just assume sarcasm.
by Willie McGee's Twin on Mar 20, 2009 8:09 PM EDT up reply actions
Actually...
It would have only been ironic had I continued to harp on how stupid the original post was after KennyWang made his clarifying post (the second one in this thread) saying that it was sarcasm. Instead, I wrote that I was “sorry” and had misconstrued his original post.
This is exactly what you didn’t do. Better get your “irony” detector tuned up.
by Willie McGee's Twin on Mar 27, 2009 2:57 PM EDT up reply actions
If there is one thing San Diego has been good at in recent years, it has been finding good relievers
in other people’s farm systems. I thought Worrell was going to have a pretty good year in SD. Now just hope that the PTBNL is someone inconsequential.
Jamie Garcia had TJ,
he and Worrell must have had pretty similar deliveries.
Space.
It's a problem we face.
So we never go anywhere.
We just stay in one place.
don't care why it happened
and you don’t want to see anyone get hurt, but I am glad we got something out of him before it happened.
Is it weird that I would rather the payroll be more like the Marlins than the Yankees?
Luke Gregerson is the PTBNL
Just thought I’d put this in the discussion
Stupid Sexy Flanders!!!
by timmycardinals on Mar 23, 2009 11:29 AM EDT reply actions
this post is a good reason for why you should take what you read on o'leary's site with
a big grain — or maybe a 50-lb. bag — of salt. while he never comes out and says it, you would get the impression that no pitcher ever suffers injury except from bad mechanics. anytime some pitcher gets injured, he seeks to create some mechanical explanation, at times clearly stretches to diagnose one (“maybe a timing issue”) and acts confused if he can’t find one.
this ignores the enormous effect of other factors, particularly good old anatomical abnormalities. no two human bodies are exactly the same (even identical twins, and I know some smart aleck was thinking that) — some pitchers have tendons and ligaments that are slightly thicker or are slightly more durable because of their composition at a cellular level or that insert at a slightly different angle or are protected (or exposed to injury) by an abnormal bone formation.
so, while it’s good to practice and promote good pitching mechanics, some pitchers could pitch indefinitely with flawed mechanics because they have very strong tendons, etc. other pitcher who might have flawless mechanics will suffer injury because they have ordinary human tendons and, no matter how you pitch, repeating a full-effort major league pitch tens of thousands of times is just not a normal human motion.
Such As...
“some pitchers could pitch indefinitely with flawed mechanics because they have very strong tendons, etc. other pitcher who might have flawless mechanics will suffer injury”
Please provide some examples of members of each group.
Well, I’m not going to play this game with you.
As soon as I pick a pitcher that I say has bad mechanics and show he has no injuries, you’ll come up with some excuse for why he has good mechanics, or why his mechanics are not great but okay. Or if I pick a pitcher with good mechanics but an injury history, you’ll say he has terrible mechanics. I know because you do this all the time on your site. Initially, you were perplexed by Mulder’s injury; now, you have a big theory. Initially, you thought Francis had great mechanics, but now you say there are flaws.
What is not doubted is that there are enormous variations in anatomy, some of which are associated with injury. For instance, look at the structure of the acromion in the shoulder, which is highly associated with rotator cuff tears. This has sure been studied a lot more carefully and established much more clearly than any of the theories that you propound on your web site. This is a naturally occurring variation in shoulder anatomy, and no amount of teaching will get rid of it. See here and here and here for thorough discussions of how extremely common, genetically determined anatomical variations of the shoulder are shown to cause rotator cuff problems and labrum fraying.
I'm Trying to be Scientific...
…about this process.
Part of the scientific process is making predictions, seeing how they hold up, and then modifying your theory to take into account reality.
If scientists gave up the first time their predictions were proved to be wrong, nothing much would be accomplished or learned.
Also, I have acknowledged that variations (e.g. 3 types if Acromial processes) in anatomy do play a role. However, I think the argument that “everyone’s different” isn’t particularly persuasive, especially when you see consistent patterns in the guys who do, and don’t, get injured.
There are also multiple high-level baseball people who follow my work. They aren’t convinced I’m right, but they do think I may be on to something.
If you want to be scientific
stop the anecdotal and specific prediction and start with a systematic classification of pitchers. You’ll never convince anyone based on 20 examples. It’s time consuming but otherwise your prone to selective sampling and a biased data set.
Mulder and Francis
“Initially, you were perplexed by Mulder’s injury; now, you have a big theory.”
This is a fairly dumb argument.
I didn’t know what was going on then. Now I think I do based on a lot of study.
That’s like mocking Newton for taking so long to figure out the whole gravity thing.
Sometimes patterns just take a while to figure out.
“Initially, you thought Francis had great mechanics, but now you say there are flaws.”
Actually, at the time I said he was on the bubble and could go either in the direction of Mulder or Maddux. I wasn’t sure which because he was on the borderline.
so, now you're isaac newton?
and you certainly do not acknowledge the role of anatomical abnormality. i find it nowhere on your site. consider this post from this month:
I was catching up on the latest news over at Yahoo Sports when I came across a blurb that mentioned that Brandon McCarthy was having shoulder stiffness and had to be scratched from a start. The blurb was accompanied by the photo below, which makes clear the root cause of Brandon McCarthy’s problems.
you went on to attribute his stiffness to “scap loading.” you make no acknowledgment that his problem could very reasonably be the natural conformation of his shoulder — you attribute it immediately, based on one photo and a “blurb”, to his mechanics. you lack any basis to rule out all the other potential causes. that is what i was complaining of: you teach people that injuries come from bad mechanics, and you act as if nothing else could.
there’s nothing particularly scientific about your predictions. science is proceeding through a defined method to create hypotheses and test them. your procedures are undefined and largely justify events that have already occurred.
most of the pitchers that you “pan” you panned after they experienced injuries. so, you say chris carpenter is an injury risk; aj burnett is an injury risk. everybody who posts to this blog knows that. you praise greg maddux and roger clemens — what a risk, to praise forty-something pitchers! you praise only a handful of young pitchers whose injury risk is unknown, although since you are happy to distance yourself from your francis predictions and as recently as 2006, you “didn’t know what you were doing”, so I doubt you would stand by any other predictions (tell me, did you return any money that you got from clients in 2006, since you didn’t know what you were doing?). and you pan several pitchers that haven’t had substantial injury yet: i am still waiting for the season ending surgery for anthony reyes, who you called a trainwreck and indicated he would not last out the
re: mulder and francis: how about this quote now that you “know something”?
If you look at the picture above of Mark Mulder, which is from Monday 6/30/2008, you will see the same basic thing but with some subtle, and possibly significant, differences.
Mark Mulder’s PAS elbow is still significantly below the level of his shoulders, as if he is still trying to ease the stress on his shoulder. However, his PAS elbow, while low, does seem to be higher than in the past, which may mean that his injury has healed to a degree. Also, it looks to me like Mark Mulder’s arm is dragging less than it did in the past, which is good.
If you compare the photo above of Mark Mulder to the photo above of Jeff Francis, you will see more similarities now than in the past, which is probably a good thing.
so in that section you indicate that in late june 2008, mulder’s pitching indicated improvement in his condition … particularly since he looks like jeff francis. you also said this:
10/10/2007: While I haven’t seen enough of Jeff Francis to render a verdict on his elbow, from what I have seen of his arm action (IOW his lack of Inverted W), I think his shoulder should hold up.
and
After analyzing Jeff Francis’ pitching mechanics, I think he is more Greg Maddux than Mark Mulder, which is good for both him and the Rockies.
of course, shortly after his injury you wrote:
Back in October of 2007, I took a quick look at the pitching mechanics of Jeff Francis. While I mostly liked what I saw, at the time I stated that I had some questions about Jeff Francis’s arm action, and in particular his low Pitching Arm Side (PAS) elbow, and wondered whether he was going to end up like Greg Maddux or Mark Mulder.
I now think that Jeff Francis is fairly likely to end up like Mark Mulder because they are both LHPs who share a common problem; they both pull in early with their Glove Side (GS) elbows which creates a subtle timing problem and increases the load on their shoulder. Their low PAS elbow is the result of this problem, more than the cause.
which was more or less a total distortion of what you’d previously written. you stated affirmatively that you thought he was more maddux than mulder.
what defines science is having a testing process, something that gives you a final answer. a yes or a no. not having 19 different bet-hedging answers. if you’re selling yourself as a predictor of pitching performance, then stick by your predictions.
what’s more science just doesn’t do any of the things you want it to do. even for relationships that are strongly supported by evidence — the link between cigarettes and cancer, or the link between obesity and diabetes — doctors don’t look at a picture of someone who is smoking and say “he’s going to die in three years” or see an obese person walking down the street and say “he’s going to get diabetes in five years.” Science is good at making general predictions. it is terrible, by and large, at making individual predictions — hence, the George Burns’s of the world who smoke like chimneys and live to be 100.
the only cases where you see individual level predictions being made come where physicians have a great deal of information about individuals — test results, mri’s, scans, etc. — and issue a prognosis. but no scientist seeks to work off the minimal information that you do: here you analyze several prospects based on a single photo. in the comments on homer bailey and garza, it’s clear you’re not relying on anything else.
i have my personal doubts about the legitimacy of your promoted mechanics, but you are claiming that mechanics can predict the immediate future of individual pitchers whom you have not examined, whose medical history you have no access to. you can’t possibly claim that is a scientific process.
by tom s. on Mar 23, 2009 11:13 PM EDT up reply actions 1 recs
+1
Chris…I would also add another note. You say you are trying to be scientific, which is certainly the correct approach. With this in mind, I’m sure you have heard of something called “confounding.” This is when an extra variable sneaks into a study and ruins, or confounds, any results that were obtained through the study. When dealing with pitching injuries in the manner you do, you run into this issue. This would be fine if you acknowledged it, but you do not.
You argue that Chris Carpenter is an injury risk because of problematic mechanics. You correctly predicted he would go down at some point after he signed his extension. However, this prediction was confounded because he’d already suffered a history of arm injuries. You could have said that his previous injuries were the result of problematic mechanics, but that wasn’t the approach you took. You said he was likely to have a future injury because of his delivery, ignoring the third variable of an injury risk. This may sound like splitting hairs, but it is anything but. You run into the same problem when prediciting AJ Burnett. He’s been hurt before…so he’s a pretty safe bet to get hurt again. Does his delivery play a role in that? Possibly. However, there are other variables such as conditioning level, anatomy, the fact that he’s throwing hard which is dangerous anyway, previous history, possible overruse, and on and on.
My point here is not to degrade you personally, or even your work per se. My point is that you need to pass your opinions off as that…opinions. They are not conclusions based on scientific reasoning, testing, or process. They are opinions based on looking at grainy video and still-photos. I have no problem with you framing them as such, saying things like “I don’t like his delivery” or “I wouldn’t teach this,” instead of your “I have the secret, and this guy’s arm will explode guaranteed” tone.
"Your Holiness, I'm Joseph Medwick. I, too, used to be a Cardinal."-Joe Medwick, to Pope Pius XII.
by redbirdnation8206 on Mar 24, 2009 11:18 AM EDT up reply actions
What's More...
“most of the pitchers that you ‘pan’ you panned after they experienced injuries.”
I was the first person to ever express doubts about Mark Prior’s shoulder and did so in December of 2005, 3 months before he started to have shoulder problems.
“i have my personal doubts about the legitimacy of your promoted mechanics”
You think it’s illegitimate and unwise to advocate the mechanics of the greatest, most durable pitchers in the world?
Guys like…
- Greg Maddux
- Nolan Ryan
- Roger Clemens
i'm confused. back in 2006, when you didn't know what was happening to
mark mulder, you “didn’t know what was going on then. Now I think I do based on a lot of study.”
In 2005, though, you KNEW what you were doing when you said prior was injured.
And as I have noted several times, you have not shown the essential fact: that the mechanics of those pitchers were what primarily kept them healthy. this is not a self-evident fact. any number of other causes could be at work, particularly genetics.
your post indicates why you are not a scientist. a scientist does not take a few case studies and generalize them to the world. a scientist takes the large view and tries to find actual causation.
if i proceeded as you did, i could become a music teacher and tell everybody that the best way to become a great saxophone player is to develop a heroin habit. emulating “the greats” is not science.
Mulder and Prior
The Mulder case was simply more complicated, and more subtle, than the Prior case. I only really got a sense of what was going on after seeing some video of Mulder that isn’t widely available.
“And as I have noted several times, you have not shown the essential fact: that the mechanics of those pitchers were what primarily kept them healthy.”
First, you’re making a very common, and perhaps the predominant, assumption; that pitchers like Mark Prior get injured when their mechanics CHANGE.
I think that assumption is questionable and am proceeding with a different assumption; that the mechanics of pitchers were never that good to begin with and eventually, and prematurely, take their toll. As a result, in my opinion pitchers get injured when their mechanics STAY THE SAME (and were never very good to begin with).
Part of the problem, and why this confusion continues, is that whole idea that Mark Prior had perfect pitching mechanics. I debunk that idea in detail in this piece…
- Mark Prior’s “Perfect” Pitching Mechanics
Second, I have documented significant mechanical differences between the mechanics of guys like Mark Prior and guys like Greg Maddux.
Many prominent baseball people think I might be on to something, so I really don’t care what someone like you thinks.
you're not even reading my replies.
i never said pitchers are injured because of changing mechanics. i said pitchers likely get injured for reasons that have NOTHING TO DO with mechanics, like their basic anatomical abnormalities.
and you are milking this prior business to a ridiculous extent. simply predicting injury in one pitcher (and I will note that 4 of our starting 5 pitchers spent time on the DL last year; predicting injury in pitchers is not like telling us where lightning is going to strike) and seeing injury actually occur does not show that you understand what causes pitching injuries.
you ignore the possibility that mark prior may have had one of several well-documented shoulder anatomic abnormalities and that THAT is why he got injured. you presume that your analysis is correct, but you have no way of excluding that possibility or any of a number of alternate explanations.
You're Assuming...
“i never said pitchers are injured because of changing mechanics. i said pitchers likely get injured for reasons that have NOTHING TO DO with mechanics, like their basic anatomical abnormalities.”
Then you’re assuming that there’s no point in trying to do anything about pitching injuries because there’s nothing you can do about them (because they are all due to anatomical anomalies).
I think that’s an incredibly irresponsible position that also isn’t shared by the vast majority of medical professionals.
i never said i don't believe that mechanics play a role.
i just don’t think mechanics plays the only role.
i did find this analysis which sounds about right. and it’s by a guy studying towards a degree in biomechanical engineering at cambridge.
Well, yeah, you can make some [educated guesses], and this is really all the experts are doing, unless they’re holding back key information from academia at large.
One of the most important things about science is being humble and acknowledging the things that you don’t know. One of the things I like about this article is that the gentleman does not try to pretend he has all the answers or can reduce all injuries to problems of pitching mechanics. i think his account is a very frank and accurate discussion of what is and is not known.
“i never said i don’t believe that mechanics play a role.”
Yes you did….
i never said pitchers are injured because of changing mechanics. i said pitchers likely get injured for reasons that have NOTHING TO DO with mechanics, like their basic anatomical abnormalities.
That’s what the word “nothing” means.
Patterns
“i did find this analysis which sounds about right. and it’s by a guy studying towards a degree in biomechanical engineering at cambridge.”
There will always be some biological variables, which is why it’s going to be impossible to drive down injuries to zero.
However, if you study mechanics, you will see that there are several arm action patterns that correlate with increased injury rates.
I’m not sure I’m 100% right, but I’m not going to just throw up my hands and, like you, assume the problem isn’t solvable, especially when many people believe I do have some ability to predict injuries.
Also, it doesn’t make any sense to throw out all pitchers with previous injuries since those previous injuries are due to poor mechanics.
you have no basis to say this
Also, it doesn’t make any sense to throw out all pitchers with previous injuries since those previous injuries are due to poor mechanics.
you’re just concluding that their injuries are caused by poor mechanics, not showing this. you have no way of knowing, for instance, what the architecture of chris carpenter’s shoulder looks like. so you cannot conclusively determine that his injuries are mechanics-driven.
correlation is not causation.
Also, it doesn’t make any sense to throw out all pitchers with previous injuries since those previous injuries are due to poor mechanics.
How do you know? Mark Prior’s first arm injury as a professional pitcher was a shoulder injury suffered after a collision with Marcus Giles. Isn’t it possible that this led to other injuries? He also had his elbow blown up by a line drive. Isn’t it possible that this led to other issues? You can argue until the cows come home that it didn’t have any effect on his subsequent injuries, and I don’t know, maybe it didn’t. But when you say your being scientific, but utterly ignore or dismiss these variables, you are being anything but scientific.
A huge part of the scientific process is isolating variables to the highest degree possible so you are only comparing specific factors and their impact on results. Sticking your head in the sand isn’t isolating anything…it’s pretending it doesn’t exist. The issue of pre-existing injuries is just the beginning of a list of un-accounted for variables that creep into any examination of pitching injuries and could (again, could, not DO) be a factor. You could write a list 3.5 internet pages long, starting with different conditioning practices and ending with poor sleep posture, and still not really hit every single one.
Furthermore, you have no access to these individual’s medical histories/X-rays/CT scans/MRI’s…so how can you argue that anatomical factors have NO effect on the current injury statuses of these players? Simply put, you can’t with any reasonable certainty. You can say “So and So has potentially problematic delivery flaws,” explain what they are, and then call it a day…but you can’t definitively argue that such and such IS the cause of an injury when you don’t have enough evidence or information to make that decision.
Who knows…you may actually be correct. The inverted W may be Megatron to your method’s Optimus Prime (yeah I have pre-teen kids, so what?) in the world of pitching arms, and simply teaching this inverted-alphabet soup out of existence will limit or even eradicate arm injuries. I am not arguing with your conclusions per se…I am challenging you on your methodology, which is riddled with errors that Introductory Experimental Psychology classes teach against. Without proper methodology, your conclusions mean about squat. That’s the cardinal rule of science and scientific thought…the methodology and process is EVERYTHING!
"Your Holiness, I'm Joseph Medwick. I, too, used to be a Cardinal."-Joe Medwick, to Pope Pius XII.
by redbirdnation8206 on Mar 25, 2009 7:02 PM EDT up reply actions
However, if you study mechanics, you will see that there are several arm action patterns that correlate with increased injury rates.
but where is your evidence for this? I mean real, solid evidence?
The way to demonstrate this prospectively (I guess it could even be done retrospectively, but this is, I guess, subject to some significant bias) would be to group all the pitchers in baseball into “high risk mechanics” and “low risk mechanics” groups, and then to test the hypothesis that within, say, five years, there is a statistically significant difference in the amount of time the “high risk” guys are on the DL with arm injuries (or, say, count the simple number or frequency of arm injuries). There’s any number of ways to do it but, with all the video footage widely available, the career records of all MLB players widely available, and the sheer number (150+) of pitchers in MLB starting rotations at any one time, the data is there. That you don’t choose to use it scientifically (at all, as far as I can see) is, I think, why a lot of people tend to think your analysis should be taken with a large pinch of salt.
As far as I can see, you’re merely cherry picking an example here, an example there. There’s no correlation or linkage between what you propose to be bad mechanics and injury risk, yet, because you haven’t gone about demonstrating it in a vaguely scientific manner. People will be a lot more prepared to consider your stuff to be worthy if you tested your hypotheses in a more scientific manner.
Perhaps you need to talk to a statistician about your work.
Because chicks dig the intentional base on balls.
by Felonius_Monk on Mar 26, 2009 7:01 AM EDT up reply actions
Worrell's Elbow
I never saw enough of Worrell to render a verdict on him.
I think I do recall seeing one clip that made my lower back hurt.
From what I read, Worrell was a fastball/slider guy, which generally isn’t good for the elbow, especially if the slider ration hits 30% or so.
this is actually really interesting - I'm learning more as I look at the existing research.
Individuals with certain shoulder conformations have a SEVENTY percent chance of developing a rotator cuff tear. That shoulder conformation is present in four percent of young athletes. Given that the seventy percent incidence of injury is for the general population and pitching would presumably aggravate the condition, at least one in every 25 pitchers has almost no chance of pitching without serious shoulder injury, simply because of their naturally occurring anatomy.
As people age, the anatomy changes, such that this conformation was found in 39% of all cadavers. (p.146) it appears that the change in shoulder anatomy actually occurs as a function of age — so older pitchers would also likely have shifts in their anatomy predisposing them to rotator cuff injuries.This is really fascinating.
Worrell's mechanics
I don’t have video other than on my DVR…so I’m not scientifically proving anything. Worrell did form the inverted W (somewhat sideways) and his timing was bad because of it – ie his front foot planted before his arm reached a sideways version of the upright position.
I think O’Leary is on to something. I do agree that he should quit his job, throw out his family for a year and categorize as many pitchers as possible into categories. That is really the only way to do the math. Then he can give correlating injury rates for the different categories and prove or disprove his predictive abilities.
Honestly, if he does this he doesn’t need to tell us, he simply needs to charge an arm and a leg for the data to a major league team (preferably the Cardinals) and then start rating the future draft pitchers. Then he could make a fortune.
Keep up the good work, Chris. You may be onto something that can change the game and make you a ton of money in the meantime. Just consider the savings on insurance for major league clubs if they could reduce injury rate dramatically; as an insurance agent, I of course could take that data to an insurance company and demand lower rates for the ball clubs using the data to draft/sign only those players with lower injury chances.
jp
look, if chris wanted to put up a site for public information, and say "this is my educated guess"
about what good mechanics are and are not, i doubt anyone would criticize him heavily. maybe we would or would not rely on his analysis, but he’s obviously free to post his own analysis.
he doesn’t need to quit his job, because this is his job (or at least one of his monetary pursuits). he has made this a BUSINESS. he charges people money to evaluate their mechanics. i think when you cross-over from informal internet kibitzer to a money-seeking, self-designated expert, you need to have some substantive basis for your analysis, and you should expect a sharper level of questioning.
he also designates himself, not as a casual observer who makes educated guesses, but as a “scientist”. if he presents himself as a scientist, it’s hardly irrational for people to ask him to conduct something that approximates actual science or to challenge him when he uses the label.
This really is the problem.
There are charlatans out there who have done with pitching mechanics the same thing that any crook or crank has done with selling pills that remove “toxins” from your body or those stupid foot-pads. These people are not scientists and they have no information to help back up any of their claims. Personally, I like and find O’leary and Boddy and some of these guys interesting, however they have to work hard to keep a speculative, skeptical view of the issue, and they must try to not start to resemble cranks and cult-leaders like Mike Marshall has.
I think it’s fine to take positions and make guesses about performance (this is what every single pitching coach is doing and he is getting a paycheck for it), and I also think that it is certainly possible to learn that some mechanics really are bad (retrospectively, even). On the other hand, as much as I find this stuff interesting and support it, this is absolutely not science. There is only one thing that has been correlated to injury strongly, and it is number of pitches thrown.
Space.
It's a problem we face.
So we never go anywhere.
We just stay in one place.
Reading that again it sounds like I'm almost calling you guys cranks,
and this is not the case. I like reading the stuff, and I think it’s cool to get a look at the way some people think about and coach mechanics.
Space.
It's a problem we face.
So we never go anywhere.
We just stay in one place.
ASMI
I think ASMI has the data I need. I need to figure out how to get access to it, because that would make things easier.
Assuming their data is good (which is a non-trivial assumption), you could run correlations between their numbers and some durability proxy like Days on the DL.
ASMI’s problem is that they just smush it all together and output ranges (e.g. from Greg Maddux to Mark Prior) without looking for any correlations.
ASMI (and my BFF Glen Fleisig)
Much of the good data ASMI has is far more scientific than correlations. Glen Fleisig has done studies on cadaverous ligaments that show that it’s possible that the force most pitchers throw with exceeds the tensile strength of the UCL, every throw, pointing to a more complex interaction in the elbow joint than most people realize.
Some of the correlations you are talking about are definitely within the realm of science, however they do not require the ASMI labs and similar studies are being undertaken as we speak by statistically-minded writers on the internet (i’m thinking of the new pitch f/x injury study).
Space.
It's a problem we face.
So we never go anywhere.
We just stay in one place.
Pitch f/x
I see too many oddities in the Pitch f/x data to trust their data set.
I have the same concern with some of the ASMI data (e.g. I think they overvalue the role of internal rotation), although it seems to be better of late.
I think ASMI’s data on Marshall’s pitchers is quite good in terms of correlating well with what you see in high speed film (and quite damning of many of Marshall’s claims).
Seems a bit contradictory to see pitch f/x as too unreliable to base studies on,
when you’re using pitching mechanics without any individual physiological reference.
Space.
It's a problem we face.
So we never go anywhere.
We just stay in one place.
PEREZ's foot...and Dizzy Dean's
Does anybody else wonder about Perez’s foot injury causing a change in his mechanics and wrecking his shoulder?
If I remember correctly, Dizzy Dean dominated the national league for five years before suffering a toe injury. He changed his mechanics to favor the hurt toe and tore his shoulder up, it ended his career.
I also can’t locate it but seem to remember something along these lines on Hawksworth? Is that right? I can’t find it, it may have been a comment.
Anyway, I hope Perez gets his foot taken care of before it messes up his pitching shoulder. Here’s to hoping the two are compeletly unrelated.
jp

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