For kicks: Holder was a trialist who made his way onto the roster during preseason. Expected to hold down the third spot at the position, coach Rob Vartughian noted that Holder's upside is "tremendous."
For kicks: At a young age, Valdes has already shown strong leadership abilities. He previously captained two teams and is expected to be an upgrade to Michael Orozco Fiscal in central defense.
For kicks: Carroll played under Union boss Peter Nowak before, at D.C. United. He's an MLS stalwart and should become the permanent patch to secure the gaping hole the Union had for a true holding midfielder.
For kicks: Farfan was a late-round steal and is expected to provide depth out wide with his skills and deceptive speed.
For kicks: He may be young, but Pfeffer is fully committed to being a threat. As the club's first home grown player, the Upper Dublin native will also add attacking depth to the midfield corps.
For kicks: The La Salle All-America entered as the most fit player in camp and was the only one kept from February's MLS Supplemental Draft. Richter also has shown versatility, and, according to the technical staff, could be used just about anywhere on the pitch.
For kicks: Ruiz returns to MLS after a 3-year hiatus. His scoring knack is renowned and he should complement fellow attacker Danny Mwanga quite nicely, taking much of the heat off 2010 MLS All-Star Sebastien Le Toux.
For kicks: The definition of determination, Agorsor battled back from a potentially career-ending knee injury at Virginia and has shown that he still has the prowess that made him a U.S. Soccer youth player of the year in 2008. Expect him to continue to grow with the return of MLS' reserve league.