At 96-62 with four games remaining, Washington is also the only team in baseball with a shot at reaching 100 wins.
The Reds and Nationals have been battling back and forth for this position for what seems like several weeks now. Each team has seen some time at the top spot, but the Nationals are the team to beat after the Reds fell to the Pittsburgh Pirates on Saturday night on an Andrew McCutchen walk-off blast.
Both teams have already guaranteed playoff spots. The Reds have already clinched the NL Central, while the Nationals' magic number is down to just one. A win or an Atlanta Braves loss on Sunday would do the trick.
With each team playing just four more games before the start of the playoffs, it'll be a race to the finish for the top two teams in the National League.