Trades are a big part of baseball, and sometimes, trades can determine who ends up winning the World Series.
Teams looking to upgrade at certain positions unload their farm system to acquire an impact bat or arm ready to help their team win. Sometimes, the players they trade from their farm system end up doing nothing good. However, other times, the prospects end up becoming future stars.
The Nationals have made some great trades in their eight-year history (including 2012), but they have also let go of some good players. In some deals, they traded a future star for a current star, and the trade worked out well for both teams. However, that wasn't always the case.
Here are four players the Nationals wish they never traded.