 Grayson Rodriguez on the mound for Baltimore. Max Scherzer takes the mound for the Rangers. Soccer, earlier in the week, D.C. United captain and center Stephen Birnbaum announced his retirement from professional soccer. This after 11 seasons, he will be honored tonight as D.C. United will play in a friendly match against the Celtic team from Scotland. That'll be a 7.30 start at Audi Field. Steve Dresner, WTOP Sports.