Everyone makes mistakes. Sometimes, these mistakes come back to bite baseball teams in the back. Be it a bad trade or a bad free-agent signing, one bad move could hurt a team's playoff chances.
Dave Cameron of Fangraphs has put together a list of what he believes are the worst transactions of this offseason. The moves that he lists either hurt the team right now or in the future.
Sometimes, not making moves hurt a team as well. This lack of action could be just as bad as signing the wrong player.
This lists includes the teams that hurt themselves the most this offseason, either for the short-term or the long-term.