I think people are arguing two different things here. No one is saying that Kotsay hasn't been good in a few moments this season or that if Green/Gamel had been in those spots they would have performed any better. What the "sabers" are saying is that going forward Kotsay is less likely to provide such performance in those moments (or any other) than guys like Green and Gamel. Baseball is a very unpredictable game and the goal of "sabers" is to try and provide what clarity can be provided. Just about anything can happen in 1 AB in 1 game, but the key is to put the players that are most likely to succeed in that situation. This is why people are clamoring for replacing guys like Kotsay. I love that he has come through in some key situations, but I have no ideas of him being a better option off the bench than Green/Gamel or quite a few other people in the organization.