I love Sheffield. I know it's probably unrealistic, and is completely superfluous, but I'd sign him as a fifth outfielder / backup DH. Drew, Baldelli, and Papi all have health issues, so this would provide some potential insurance. Granted, Sheffield is banged up, and he never may be an impact player again, but I'd take the gamble. When healthy, the guy can rake like few players in the game.