Those of you out there who listen to our podcasts are probably used to hearing me complain about defensive metrics. In the end, my objections to defensive metrics are limited in their scope - I just think they should be approached as pieces of data, rather than definitive, precise measurements. However, that does not mean that I don't care about defense, or that I don't think it's important. For a long time, defense was so underrated that it was one of the market inefficiencies that Billy Beane tried to exploit. Picked up off the scrap heap, J.B. Shuck could provide a lot of value with his glove this year - especially given the White Sox' recent history.