New England Revolution defender Ted Chronopoulos has been added to the 21-player U.S. roster for the team’s Sunday showdown with Argentina in Washington, D.C. Chronopoulos, who played collegiately at San Diego State University, earned his only previous cap for the U.S. back on June 12, 1997 against Israel. The 26-year-old Chronopoulos joins forward Ernie Stewart and defender Leo Cullen as Bruce Arena’s final additions to the U.S. roster. Here is the current U.S. roster: Goalkeepers: Brad Friedel (57 caps/0 goals), Kasey Keller (34/0). Defenders: Jeff Agoos (91/3), Gregg Berhalter (4/0), C.J. Brown (5/0), Ted Chronopoulos (1/0), Leo Cullen (1/0), Robin Fraser (17/0), Carlos Llamosa (3/0). Midfielders: Chris Armas (6/0), Eddie Lewis (7/1), Claudio Reyna (64/7), Tony Sanneh (4/1), Richie Williams (3/0). Forwards: Chris Albright (0/0), Landon Donovan (0/0), Cobi Jones (114/8), Jovan Kirovski (29/5), Roy Lassiter (28/4), Joe-Max Moore (74/18), Ernie Stewart (51/6).