Adding pieces during the offseason can be a tricky thing, especially in baseball, where teammates are forced to deal with each other for far longer periods of time than in any of the other major sports.
Not only must a team take into consideration a player's talent level and what he can offer on the field, but what kind of person that player is comes into play quite often as well.
How will does he fit into the clubhouse dynamic? Does he have the right personality, or will he rub his new teammates the wrong way?
Of course, production breeds success, and success has a way of trumping all. But piecing together a major league roster is an inexact science, for sure.
As teams continue to try and get the formula just right, let's take a look at the best addition that each team has made thus far.
*Note; A team re-signing their own free agents does not count as a new addition. This must be a player who spent 2012 with another organization.