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Tuesday, September 16, 2008

Linear Weights, By Men on Base

By Tangotiger, 03:14 PM

There are different ways to do Linear Weights.  You can do it by men on base, as SG is doing here, or by the base/out states, or by game state (inning, score, base, out, and shown at Fangraphs as WPA/LI).  They all tell a story.  The nice thing about the men on base one is that it’s only 8 lines per player, which is a heckavu lot easier to swallow than 24 or the thousands by game state.

I’m wondering, under the “less is more” scenario, construct the 24 base/out set into something more manageable.  For example, we can have these states:
1- man on 1B, 3B (runner on 2B optional), less than 2 outs
2- man on 3B (excluding above), and less than 2 outs
3- man on 1B, 2B (excluding all the above), less than 2 outs
4- man on 1B (excluding all the above), less than 2 outs
5- man on 2B or 3B (excluding all the above)
6- man on base (excluding all the above… when I think just leaves me with man on 1B, 2 outs)
7- bases empty less than 2 outs
8- bases empty 2 outs

Do these make sense in terms of trying to segregate based on how the batter/pitcher might change his approach to the base/out state?  This is my reasoning for those 8 categories:

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(10) Comments • 2008/09/17 • SabermetricsLinear_Weights
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September 16, 2008
Linear Weights, By Men on Base