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THE BOOK--Playing The Percentages In Baseball

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Tuesday, April 21, 2009

Nervous closers

By Tangotiger, 03:35 PM

In one of Studes’ batted ball reports (sub required), he introduced “Nervous Closers”.  The concept is remarkably simple:
1. Figure out the Leverage Index (LI) when he comes into the game
2. Figure out if his LI ever goes above his initial LI

That’s it.  So, a reliever can get 2 outs, allow a runner on 1B, and then get the 3rd out and not make you nervous.  But, that same reliever can start with the runner on 1B and then get 3 outs.  He made you nervous.

Studes makes a few adjustments along the way, but that’s the basic idea.  He concludes:

No matter how we cut the data, it’s clear that K-Rod likes to make things, um, interesting.

(3) Comments • 2009/04/21 • SabermetricsLeverage_Index
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April 21, 2009
Nervous closers