Four Strikes And You’re Out – 538.com

This one call illustrates a statistical regularity: Umpires are biased. About once a game, an at-bat ends in something other than a strikeout even when a third strike should have been called. Umpires want to make the right call, but they also don’t want to make the wrong call at the wrong time. Ironically, this prompts them to make bad calls more often.

Ha, is this turning into a baseball blog? Man, I gotta recode the posting bookmarklet, it ain’t cutting it.