There are three ways to build a team. You can draft and develop players, trade for players in their prime or sign free agents.
Red Sox general manager Theo Epstein has proven in his tenure in Boston that he is among the best in the game at the first two. But he has struggled at signing free agents. From Edgar Renteria to Julio Lugo, JD Drew to the recently-released Mike Cameron, there are countless examples of poor additions by the Sox GM.
But that is not to say there are no successes. Here are his five best FA signings.