Comments on: Verlander arm angle follow-up http://www.detroittigersweblog.com/2008/04/verlander-arm-angle-follow-up/ News, views, and analysis on the Detroit Tigers and baseball Mon, 08 Sep 2008 02:19:18 +0000 http://wordpress.org/?v=2.6 By: The Detroit Tiger Weblog » Blog Archive » Game 26: Angels at Tigers http://www.detroittigersweblog.com/2008/04/verlander-arm-angle-follow-up/#comment-82150 The Detroit Tiger Weblog » Blog Archive » Game 26: Angels at Tigers Sun, 27 Apr 2008 23:08:49 +0000 http://www.detroittigersweblog.com/2008/04/verlander-arm-angle-follow-up/#comment-82150 [...] the mound it will be Justin Verlander and Jered Weaver. Verlander reclaimed some of his missing velocity his last time out after tweaking his arm angle. He also earned his first [...] [...] the mound it will be Justin Verlander and Jered Weaver. Verlander reclaimed some of his missing velocity his last time out after tweaking his arm angle. He also earned his first [...]

]]> By: Eddie http://www.detroittigersweblog.com/2008/04/verlander-arm-angle-follow-up/#comment-82075 Eddie Sat, 26 Apr 2008 15:36:30 +0000 http://www.detroittigersweblog.com/2008/04/verlander-arm-angle-follow-up/#comment-82075 I'd lean towards calibration issue. It doesn't seem logical to me that his hand would be further from his body and higher up. My understanding is that this data is taken from a fixed point, so maybe he's simply starting from a different point of the rubber. Another explanation could be a smaller stride, which would lead to a higher release point. I would guess the thing to look for would be precision within each start and whether he is having problems repeating his delivery within the start. Pitchfx seems to still be somewhat of a work in progress. I’d lean towards calibration issue. It doesn’t seem logical to me that his hand would be further from his body and higher up. My understanding is that this data is taken from a fixed point, so maybe he’s simply starting from a different point of the rubber. Another explanation could be a smaller stride, which would lead to a higher release point.

I would guess the thing to look for would be precision within each start and whether he is having problems repeating his delivery within the start. Pitchfx seems to still be somewhat of a work in progress.

]]> By: billfer http://www.detroittigersweblog.com/2008/04/verlander-arm-angle-follow-up/#comment-82061 billfer Sat, 26 Apr 2008 03:23:17 +0000 http://www.detroittigersweblog.com/2008/04/verlander-arm-angle-follow-up/#comment-82061 Tom - No idiocy at all. The bigger explanation is in the post I linked to, but Brian P got it pretty much right. It's actually a proxy for release point. The pitch f/x cameras pick up the ball 50 feet from the front of home plate. Because it's always 50 feet (now it is, they experimented with 45 and 55 feet last year as well) we don't really have the need for the 3rd dimension. As for Brian's request it is possible, but for what I was looking for I decided to go with simplicity in the chart. Tom -

No idiocy at all. The bigger explanation is in the post I linked to, but Brian P got it pretty much right. It’s actually a proxy for release point. The pitch f/x cameras pick up the ball 50 feet from the front of home plate. Because it’s always 50 feet (now it is, they experimented with 45 and 55 feet last year as well) we don’t really have the need for the 3rd dimension.

As for Brian’s request it is possible, but for what I was looking for I decided to go with simplicity in the chart.

]]> By: Brian P http://www.detroittigersweblog.com/2008/04/verlander-arm-angle-follow-up/#comment-81987 Brian P Fri, 25 Apr 2008 20:56:06 +0000 http://www.detroittigersweblog.com/2008/04/verlander-arm-angle-follow-up/#comment-81987 Tom, it's a plot of where Verlander is releasing the ball. Or in other words, where he's letting go of the ball. It's looking from home plate to the pitcher's mound (so I assume). The more positive the vertical axis, the higher he's releasing the ball. The more negative the horizontal axis, the more towards third base he's releasing the ball. It would be interesting to see which of these points are balls and strikes. It would be even better, and more pain-staking for those collecting this data, to include all three spatial dimensions. Tom, it’s a plot of where Verlander is releasing the ball. Or in other words, where he’s letting go of the ball. It’s looking from home plate to the pitcher’s mound (so I assume). The more positive the vertical axis, the higher he’s releasing the ball. The more negative the horizontal axis, the more towards third base he’s releasing the ball.

It would be interesting to see which of these points are balls and strikes. It would be even better, and more pain-staking for those collecting this data, to include all three spatial dimensions.

]]> By: tom http://www.detroittigersweblog.com/2008/04/verlander-arm-angle-follow-up/#comment-81980 tom Fri, 25 Apr 2008 19:39:35 +0000 http://www.detroittigersweblog.com/2008/04/verlander-arm-angle-follow-up/#comment-81980 Billfer, i feel like an idiot for asking, and perhaps you can just send me a link, but i have no idea what this graph means. Clearly, there's an anomaly between 9/27/2007 and this year, but what does it mean. is this measuring the arm angle in terms of JV's body, or the ground, or what? Sorry to ask questions that probably are obvious to most of your subscribers here, but it looks like you're on to something, and I'd like to understand what it is. Thanks in advance. Billfer, i feel like an idiot for asking, and perhaps you can just send me a link, but i have no idea what this graph means. Clearly, there’s an anomaly between 9/27/2007 and this year, but what does it mean. is this measuring the arm angle in terms of JV’s body, or the ground, or what? Sorry to ask questions that probably are obvious to most of your subscribers here, but it looks like you’re on to something, and I’d like to understand what it is. Thanks in advance.

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