Comments on: Mejia on Pitch Fx http://www.metsminorleagueblog.com/2009/11/19/mejia-on-pitch-fx/ The Premier Blog about the Mets Minor League System Fri, 12 Mar 2010 12:45:14 -0400 http://wordpress.org/?v=2.9.1 hourly 1 By: Max http://www.metsminorleagueblog.com/2009/11/19/mejia-on-pitch-fx/comment-page-1/#comment-6233 Max Thu, 19 Nov 2009 16:51:34 +0000 http://www.metsminorleagueblog.com/?p=6223#comment-6233 The really unique thing about Mejia is the 4-seam. That kind of velocity is rare but rarer still to be accompanied with so much "sink". Which is why it doesn't stand out (movement-wise) from his 2-seam and changeup as much as some other pitchers. The really unique thing about Mejia is the 4-seam. That kind of velocity is rare but rarer still to be accompanied with so much “sink”. Which is why it doesn’t stand out (movement-wise) from his 2-seam and changeup as much as some other pitchers.

]]> By: Max http://www.metsminorleagueblog.com/2009/11/19/mejia-on-pitch-fx/comment-page-1/#comment-6232 Max Thu, 19 Nov 2009 16:41:31 +0000 http://www.metsminorleagueblog.com/?p=6223#comment-6232 It's fine for the 2-seamers (the real ones in the green circle) and the changeups to have the same movement. Pitch f/x research (I think it was Josh Kalk or Dave Allen) has shown that 2-seamers or fastballs that tail are more effective vs. same-handed batters, while obviously changeups are much more effective vs. opposite-handed batters. Once Mejia is past the developmental stage he probably shouldn't mix and match those 2 pitches within the same at-bat. At least not too often anyway. The fastballs are more of a continium than 2 or 3 distinct pitches and yeah that's not really what you want ideally. Do you know if he deliberately throws a cutter in addition to his 4-seam and 2-seam? It almost looks like 3 groups of fastballs but it's hard to tell. You're right to point out that Mejia doesn't repeat his movement the way a fully developed ML pitcher does but at the extremes, he has the differentiation in movement to be really really successful. It’s fine for the 2-seamers (the real ones in the green circle) and the changeups to have the same movement. Pitch f/x research (I think it was Josh Kalk or Dave Allen) has shown that 2-seamers or fastballs that tail are more effective vs. same-handed batters, while obviously changeups are much more effective vs. opposite-handed batters. Once Mejia is past the developmental stage he probably shouldn’t mix and match those 2 pitches within the same at-bat. At least not too often anyway.

The fastballs are more of a continium than 2 or 3 distinct pitches and yeah that’s not really what you want ideally. Do you know if he deliberately throws a cutter in addition to his 4-seam and 2-seam? It almost looks like 3 groups of fastballs but it’s hard to tell.

You’re right to point out that Mejia doesn’t repeat his movement the way a fully developed ML pitcher does but at the extremes, he has the differentiation in movement to be really really successful.

]]> By: sylvan http://www.metsminorleagueblog.com/2009/11/19/mejia-on-pitch-fx/comment-page-1/#comment-6231 sylvan Thu, 19 Nov 2009 16:23:03 +0000 http://www.metsminorleagueblog.com/?p=6223#comment-6231 Mejia's stats have been pretty wacky. 14.1 IP 25 H 0 HR 13 BB 16 K 21-6 GO-AO .481 BABIP His control obviously hasn't been good, but that BABIp really is grotesque Mejia’s stats have been pretty wacky.

14.1 IP
25 H
0 HR
13 BB
16 K
21-6 GO-AO
.481 BABIP

His control obviously hasn’t been good, but that BABIp really is grotesque

]]> By: big baby http://www.metsminorleagueblog.com/2009/11/19/mejia-on-pitch-fx/comment-page-1/#comment-6230 big baby Thu, 19 Nov 2009 16:04:57 +0000 http://www.metsminorleagueblog.com/?p=6223#comment-6230 in mejia's defense, he's only giving up singles. i bet his BABIP is astronomical right now. in mejia’s defense, he’s only giving up singles. i bet his BABIP is astronomical right now.

]]>