It apparently does much more than that. What does this mean? Like I said, there is no way to measure its bluntness There's no way, or you don't want to spend the time to do so? Its commercial in that its a proprietary product. Is its methodology published somewhere that I'm not aware of? Commercial and propietary aren't synonyms. There are different versions of MLEs. As far as methodology goes, unless you are looking to improve it, the methodology isn't as important as the results. Other than individual cases, why do you believe that MLEs aren't useful? As far as Casey goes, I do hope that he gets traded if he can bring in a decent return. I was looking through teams that could use a SS and 3B and was looking at the Twins. I don't know what they would be willing to give up, but I was looking at Baker. I doubt the Twins would be eager to give him up, but I think that improves both teams. Edit: I didn't actually specify what I was thinking of in trading for Baker. I was thinking about Hardy and Casey. That's more than I would like to give up, so maybe the Brewers get a minor league pitcher back.