SpeX: a simple yet effective index to grade pitchers and estimate future performance.

Some pitching stats, like Called Strikes plus Whiffs (CSW) and Strikeouts minus Walks per inning (K-BB)/IP, are useful to get an initial estimate of pitcher’s performances due to their descriptive capacities, but also because of their predictability qualities, confirmed through their correlation with other stats. As an example, in a constrained data set, CSW and … Read more