Following their 3-0 loss to FC Dallas, D.C. United announced on their website (at 8am on an Easter Sunday morning) the signing of forward Andrea Mancini to their roster. The 23-year old forward and former member of the Manchester City youth system is the son of Roberto Mancini, coach of Inter Milan, the Serie A team in Italy owned by Erick Thohir, who is also the Managing Partner of D.C. Mancini appeared as a trialist in preseason, playing less than a half hour of action before being signed to the first team.
Mancini simultaneously fills the last first team and international roster spots, so unless a corresponding move is made to free up a position, the chance of finding a field player for the time being is slim. It appears they may be able to an additional goalkeeper under the "Extreme Hardship Rules" (the club has no available roster spots and at least two of its goalkeepers are not available) so they might be able to add someone, whether it's the currently training Tally Hall or another person, to a short-term deal.
We'll see what Mancini brings to the table at some point in 2016.