THE BOOK--Playing The Percentages In Baseball

Monday, May 21, 2007

The fielding system approach I’ve been preaching

http://stat.wharton.upenn.edu/~stjensen/research/safe.html

Whereby UZR and other systems use discrete zones, this approach uses a continuous function.  It doesn’t look like they use as many parameters as MGL’s UZR (park, GB/FB tendency, base/out, etc), but nonetheless, they’ve got the basic framework down.  I’m not sure how they convert plays to runs either. 

(Hat tip: David A.)