Data dump: My homemade stats for 2008
December 20, 2008 2 Comments
With the release of the 2008 Retrosheet play-by-play file (yay Retrosheet!), I’m able to present my home-cooked stats for 2008. As always, everything sorted by Retrosheet ID.
Quick description: It’s my Retrosheet-based fielding evaluation system (out probability added above average). There are no catcher stats because the catcher isn’t often involved with batted ball plays.
Quick description: My plate discipline stats are based on signal detection theory and go beyond the simple walk/strikeout framework. A high sensitivity is good, but the best number for “critereon” is 1.00, no higher, no lower. Sensitivity is a measure of how good a player is at avoiding strikes against him. Critereon (or response bias) is a measure of how likely he is to swing.
Quick description: I decided to go about looking at Bill James’s old speed score formula to see if I could do one better. This is what resulted. My numbers were slightly better than James’s in terms of reliability over time, but they are not fun to calculate.
Quick description: Same basic idea as the speed score. But with power.
All of these stats are free to use and/or re-publish provided that they are provided free to everyone and I get a mention. Enjoy.