A bit of a random post
November 7, 2005 6 Comments
I’ve been doing a lot of work with fielding recently, and one thing I wanted to mention is just how well simple fielding stats can serve you. Fielding%, for example, is often criticized and with good reason. However, I’ve found that for infielders, if you remove putouts from the equation to create a modified fielding%, you can learn a lot. That is, A/(A+E) is a generally good measure of fielding talent at second, third, and shorstop, correlating with Zone Rating (which, of course, is much, much better) at about .5. Such a correlation is pretty solid; for example, Baseball Prospectus fielder ratings, which are much more complicated, correlate at about .6 with Zone Rating. Fielding Win Shares, also much more complicated, correlate at roughly .5. If you were to transfer this metric into the outfield and use putouts, it would not work well, mainly because errors in the outfield are too rare to tell you anything. But for infielders, there is nothing wrong with using A/(A+E) for a quick measure of their value. Generally speaking, it works.