Not sure. There's only about 100 games to use with UZR, but it says he's about a -7 defender while Johnson is a -3 defender. That would sway me a bit toward Johnson, if accurate. That said, my main reasoning in favoring DeWitt slightly is that he's three years younger and will be cheap for significantly longer. Johnson will cost $5+ million next year through arbitration and then will be a free agent. Johnson has been much better in the majors so far (.793 OPS vs .719) however. Biggest advantage to DeWitt is that he's young and can improve and will be cheap for a while, whereas Johnson will likely be overpaid by 2012. Johnson's been better, however, and likely will be the better offensive player.