Video: Martin Perez and Juan Grullon
by NoNameOnCard on May 13, 2009 12:20 PM CDT
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PrintThis is latest entry in my Texas Rangers Prospects video scouting series. It features LHP prospects Martin Perez of whom you've heard good things and Juan Grullon of whom you've probably heard nothing.
Martin Perez:
Perez pronates like this on each of his pitches - fastball, curveball, and change up - and it is excellent for both health and performance. Pronation allows for better ball rotation (more spin therefore more movement) and helps protect the elbow from forearm flyout. This is a good thing because Perez doesn't get his arm nearly as vertical when he throws his fastball and change up compared to when he throws his curveball.
Juan Grullon:
The simplicity of his motion allows Grullon supreme control over his follow-through. Under such control, Grullon's pitching arm stays on the pitching arm side of his torso; it does not wrap across his body. His pitching arm is decelerated so well by his latissimus dorsi that his elbow actually winds up tucked in next to his rib cage as he finishes his follow-through.
Read the whole thing here: Texas Rangers Prospects: Martin Perez and Juan Grullon
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Yeah, I'm dumb.
Just a sec, got used to doing FanShots…
by NoNameOnCard on May 13, 2009 12:26 PM CDT up reply actions
These are very
fanpost worthy. Completely relevant, topical, informative, etc.
G G G E-flat_______ F F F D__________....
-1
"if my kid said 'uhh' that much, i would say, Hey! ... stop saying 'uhh' that much..." - dennis miller
okay, now
+2
"if my kid said 'uhh' that much, i would say, Hey! ... stop saying 'uhh' that much..." - dennis miller
heh
¡Prefiero morir de pie que vivir siempre arrodillado!
by inactive lsb user on May 14, 2009 2:41 PM CDT up reply actions
Juan Grullon
Just to clarify, because I get confused on this- Juan and Geuris Grullon are not the same guy, correct?
"I dont care to debate with a troll." - Sharky
Not the same guy.
Geuris is much larger. Both are left-handed pitchers, though.
They’re sort of the like the two Guillermo Pimentels… kind of.
by NoNameOnCard on May 13, 2009 1:12 PM CDT up reply actions
I don't know what to say.
These are so awesome.
The 40 Trumps All!!!
You want the mustache on or off? ... ... ... Too bad.
I don't know that much about pitching mechanics.
But I do know enough to be excited when I see “pronated curve.”
I need to learn how to pronate my curves...
or maybe develop the curves before learning to pronate would help.
"Hang-Dai, Wu...Hang-Fu$&ing-Dai"
by Walter Sobchak on May 13, 2009 4:28 PM CDT up reply actions
Nah... then you'd be learning the wrong way...
before learning the right way. There’s no real sense in that… even if your comment is tongue-in-cheek.
by NoNameOnCard on May 13, 2009 4:31 PM CDT up reply actions
Im actually trying to teach myself a pronated curve now
as i wanna pitch in rec league baseball…
"The House That Ruth Built, 85 years old, goes out as The House That Hamilton Knocked Down"
Tip
Don’t try to “pull it down” or “hook it” or use any of that normal curveball jargon. You throw it like a fastball, but with your fingers pushing the top of the baseball instead of the bottom.
The key is making sure your hand is supinated before release. After all, you can’t pronate without supinating first. I recommend supinating as early as possible.
by NoNameOnCard on May 13, 2009 4:42 PM CDT up reply actions
total rec.
…and thanks for letting us bask in your overwhelming knowledge.
seriously, as a excoach in another sport i really enjoy the uber technical side of things i don’t know and you’re always a good source for learning.
"Anyone that isn't pro-choice never met you" ~Brian Thomas on Seth...
Thanks.
That’s the whole idea behind my blog. I’d rather be right than stick to my guns because I don’t want people to read garbage and bulls*** on my site and come away thinking they’ve learned something.
If I’m wrong about something, I want people to call me out on it – as long as they’re willing to actually have a conversation about the matter. I don’t just want to know that I’m wrong, I want to why and how as well.
Thanks again.
by NoNameOnCard on May 13, 2009 4:30 PM CDT up reply actions
Tipping pitches?
From your description of Perez:
Perez doesn’t get his arm nearly as vertical when he throws his fastball and change up compared to when he throws his curveball
Is this something that MLB hitters will pick up on?
by NorCalRangersFan on May 13, 2009 4:34 PM CDT reply actions
My sample was very small.
I believe that on the day I recorded him, his arm slot was noticeably different on his curve. At full speed, it’s much, much harder to see.
I don’t have enough evidence to say that he doesn’t go that high with his fastball and change. All I can say is that those two had more of a 3/4 release on this specific day.
He’s got plenty of time to work on it (still only 18), but they probably won’t tweak him too much until opposing hitters start reacting to the curve like they know it’s coming.
by NoNameOnCard on May 13, 2009 4:38 PM CDT up reply actions
Pronate?
I’m clear about this. Does pronating mean that, for a right-handed pitcher, the palm starts out facing to his right and ends up facing to his left?
I propose a 5-year moratorium on trading any young Ranger pitchers who throw over 90 mph.
You seem to be describing supination.
Of course, in the anatomical position, your description would be correct.
I went through a lot of trouble to define these terms in a glossary on my site. I go to extra lengths to make these definitions easy to get to from within my articles.
Try this: pronation
by NoNameOnCard on May 13, 2009 6:45 PM CDT up reply actions
If it were that simple I wouldn't have asked....
I have read many descriptions of pronation (such as in some of Jason Parks’ interviews) but their descriptions did not jibe with my understanding of pronation, and with the definitions you linked to—though the definitions did seem to fit what I described above.
I propose a 5-year moratorium on trading any young Ranger pitchers who throw over 90 mph.
Your description lacks context.
The anatomical position, which involves the arms hanging straight down from the shoulder, is the only position in which your description matches pronation. In the context of a throwing motion, I have no idea how a right-handed pitcher’s palm can face the right until after pronation.
It’s a very simple forearm-twisting action. I don’t understand where there could be confusion.
by NoNameOnCard on May 14, 2009 6:52 PM CDT up reply actions
Damn
I hit reply by accident.
I propose a 5-year moratorium on trading any young Ranger pitchers who throw over 90 mph.
I'm so confused by the issue....
That apparently I can’t even ask the question correctly.
I propose a 5-year moratorium on trading any young Ranger pitchers who throw over 90 mph.
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