D.C. United and Nashville SC have no room for error down the final stretch of the MLS regular season.
With both clubs outside playoff position in the Eastern Conference and in search of a much-needed victory, D.C. visits Nashville on Wednesday night.
D.C. United (8-13-10, 34 points) are three points out of a playoff spot in the East and have two teams ahead of them in the standings that are also currently out of the postseason mix. D.C. is 0-1-2 after winning four of its previous five — a successful stretch that began with a 2-1 victory over Nashville (8-14-9, 33 points) on July 13…