Not every acquisition that a team makes turns out to be a good one. After this season, there will certainly be teams that wish they did not give out big-money contracts to one of the players they signed.
We have seen it in the past and it will happen again. Jason Bay has been a bust for the New York Mets, and Carl Crawford has been a bust for the Boston Red Sox. Those are just two of the many examples of contracts that teams wish they had back.
Teams can also make trades that look great at the time, but in the end, the deals come back and bite them. There are a few teams that made moves like that this winter, as well.