Comments on: Expected BABIP for Pitchers http://www.fangraphs.com/blogs/index.php/expected-babip-for-pitchers/ Daily baseball statistical analysis and commentary Sun, 12 Feb 2012 20:36:47 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: David Appelman http://www.fangraphs.com/blogs/index.php/expected-babip-for-pitchers/#comment-34463 David Appelman Fri, 23 May 2008 17:52:18 +0000 http://www.fangraphs.com/blogs/index.php/expected-babip-for-pitchers/#comment-34463 You can click on the links in that post. I guess they're not really highlighted, but just click on "Pitch Location and Groundballs" or "Pitch Zone Charts" in the above post. You can click on the links in that post. I guess they’re not really highlighted, but just click on “Pitch Location and Groundballs” or “Pitch Zone Charts” in the above post.

]]> By: MrLomez http://www.fangraphs.com/blogs/index.php/expected-babip-for-pitchers/#comment-34462 MrLomez Fri, 23 May 2008 17:44:21 +0000 http://www.fangraphs.com/blogs/index.php/expected-babip-for-pitchers/#comment-34462 David and Dave, Thanks for those insights. And where can I look at those posts with the Pitch Zone Charts? David and Dave,

Thanks for those insights.

And where can I look at those posts with the Pitch Zone Charts?

]]> By: Dave Cameron http://www.fangraphs.com/blogs/index.php/expected-babip-for-pitchers/#comment-34452 Dave Cameron Fri, 23 May 2008 15:11:37 +0000 http://www.fangraphs.com/blogs/index.php/expected-babip-for-pitchers/#comment-34452 Yea, those posts were great. Perhaps it's more your theory than mine... Yea, those posts were great. Perhaps it’s more your theory than mine…

]]> By: David Appelman http://www.fangraphs.com/blogs/index.php/expected-babip-for-pitchers/#comment-34448 David Appelman Fri, 23 May 2008 13:24:23 +0000 http://www.fangraphs.com/blogs/index.php/expected-babip-for-pitchers/#comment-34448 Dave, have you ever seen these post I did a couple years ago: <a href="http://www.fangraphs.com/blogs/index.php/pitch-location-and-groundballs/" rel="nofollow">Pitch Location and Ground Balls</a>, <a href="http://www.fangraphs.com/blogs/index.php/research-pitchzone/" rel="nofollow">Pitch Zone Charts</a> Think they definitely help support your theory. Dave, have you ever seen these post I did a couple years ago: Pitch Location and Ground Balls, Pitch Zone Charts

Think they definitely help support your theory.

]]> By: Dave Cameron http://www.fangraphs.com/blogs/index.php/expected-babip-for-pitchers/#comment-34436 Dave Cameron Fri, 23 May 2008 06:15:28 +0000 http://www.fangraphs.com/blogs/index.php/expected-babip-for-pitchers/#comment-34436 My theory - groundball and flyball rates are a function of fastball location. Groundball pitchers pitch down in the zone (usually with a two-seam fastball) and flyball pitchers pitch up in the zone (always with a four seam fastball). Both of these are by design - the guys who pitch up generally have good enough fastballs to get by hitters and rack up the strikeouts, and the guys who pitch down are just getting as many ground balls as they can. To give up a lot of line drives, you'd have to consistently pitch in the middle of the strike zone, and really, that's a pretty terrible idea, so pitchers don't do it. Line drive rate is a function of missing location (either up or down), and mistakes have more variance. My theory – groundball and flyball rates are a function of fastball location. Groundball pitchers pitch down in the zone (usually with a two-seam fastball) and flyball pitchers pitch up in the zone (always with a four seam fastball). Both of these are by design – the guys who pitch up generally have good enough fastballs to get by hitters and rack up the strikeouts, and the guys who pitch down are just getting as many ground balls as they can.

To give up a lot of line drives, you’d have to consistently pitch in the middle of the strike zone, and really, that’s a pretty terrible idea, so pitchers don’t do it. Line drive rate is a function of missing location (either up or down), and mistakes have more variance.

]]> By: MrLomez http://www.fangraphs.com/blogs/index.php/expected-babip-for-pitchers/#comment-34433 MrLomez Fri, 23 May 2008 05:59:06 +0000 http://www.fangraphs.com/blogs/index.php/expected-babip-for-pitchers/#comment-34433 I get that LD% doesn't stay consistent year to year, but why? If certain pitchers have extreme FB tendencies and others GB tendencies, why wouldn't still other pitchers be more prone to a consistently high LD%? Do any variables correlate to LD%? I'm thinking maybe pitch-type stats, like fastball%. I get that LD% doesn’t stay consistent year to year, but why? If certain pitchers have extreme FB tendencies and others GB tendencies, why wouldn’t still other pitchers be more prone to a consistently high LD%?

Do any variables correlate to LD%? I’m thinking maybe pitch-type stats, like fastball%.

]]> By: David Appelman http://www.fangraphs.com/blogs/index.php/expected-babip-for-pitchers/#comment-34425 David Appelman Fri, 23 May 2008 04:07:12 +0000 http://www.fangraphs.com/blogs/index.php/expected-babip-for-pitchers/#comment-34425 Brett: Exactly. Brett: Exactly.

]]> By: Brett http://www.fangraphs.com/blogs/index.php/expected-babip-for-pitchers/#comment-34412 Brett Fri, 23 May 2008 01:35:31 +0000 http://www.fangraphs.com/blogs/index.php/expected-babip-for-pitchers/#comment-34412 Cool. So one of the main points Voros originally made is that BABIP correlates very poorly from year to year. But we see that there is a relationship between BABIP and hit type, specifically LD% as it's coefficient makes it the dominant term in your equation. Does this mean that LD% doesn't correlate well year to year? Cool.

So one of the main points Voros originally made is that BABIP correlates very poorly from year to year. But we see that there is a relationship between BABIP and hit type, specifically LD% as it’s coefficient makes it the dominant term in your equation. Does this mean that LD% doesn’t correlate well year to year?

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