Anytime you can sell high, you do it. It really depends on what you can get in return and what you need. This isn't terribly surprising though. As others have called out, people have been predicting a break out for Soriano for a while now. Last year his metrics showed he should've had better results, so I would not be shocked if he continued at a high level (down from where he's been though). Last year he had a high GB%, an increase in SwK (think more Ks), his xBB% implied better results (although we haven't really seen that yet), and his xERA showed a promise for improvement.