The Washington Nationals are having a great year, as they are an even .500 with a 46-46 mark going into the season's second half. Despite having their best year since moving to Washington in 2005, the Nationals do have several sizable holes. Filling them would put the team over the top and into the wild-card race in the National League, as the Phillies will likely be too hard to catch.
I feel that the Nationals will need four pieces to take them from fringe postseason contenders to a legitimate threat. They will need the following:
2 quality relievers (one lefty, one righty)
1 leadoff hitter
1 veteran No. 2 or No. 3 starting pitcher
For the record, none of these players have been directly linked to the Nationals in trade talks. I don't believe the Nationals could afford to bring in all four players without wrecking their minor league system, but a guy can dream, can't he?
Their will be players that are repeated in the following trades. Think of it more as a case-by-case basis, with many of the players being interchangeable.