When you're relying on Clayton Richard, Dallas Beeler, and an injured Tsuyoshi Wada for the 5th spot, I think starting pitcher is clearly the biggest need. Plus, what real difference-maker is available as a bat + easily slots into the everyday lineup? Another starting pitcher provides a real impact, IMO. I think you at least have to explore what a package would cost. There are some intriguing options out there: Shields/Upton (Justin, not the terrible one), Bruce/Leake, OR if you're willing to throw the bank at someone, Price/Cespedes, Reddick/Gray.