[USA MEN] D.C. United midfielder Chris Pontius and Birmingham City defender Jonathan Spector replaced FC Dallas defender Zach Loyd and Chivas USA defender Heath Pearce for the USA's friendlies against Costa Rica on Friday at the Home Depot Center in Carson, Calif. (ESPN2, ESPN3.com, Galavision, 8 p.m. PT, 11 p.m. ET) and Belgium four days later at Brussels' King Baudouin Stadium (ESPN, ESPN3.com, 2:30 p.m. ET). In addition to injury concerns about Loyd and Pearce (both have hamstring strains), Clint Dempsey will join the USA in Belgium instead of flying to California because of back spasms.
Spector, who has 31 caps and was on the roster for the 2010 World Cup, is starting for Birmingham City of the English League Championship following a move from West Ham United.
Pontius is making his second appearance in a U.S. national team camp after participating in the January camp in 2010 and will be looking to earn his first cap. He has scored seven goals this season for D.C. United, one more than he scored in his first two seasons. After a standout rookie season, a hamstring injury cut short his 2010 campaign.
Dempsey, who scored his first goal for Fulham on Sunday, will remain in London to receive treatment for back spasms. He will join the team in Brussels on Sunday.
GOALKEEPERS (2): Bill Hamid (D.C. United), Tim Howard (Everton)
DEFENDERS (7): Carlos Bocanegra (Rangers), Edgar Castillo (Club America), Timmy Chandler (FC Nuremberg), Clarence Goodson (Brondby), Michael Orozco Fiscal (San Luis), Tim Ream (New York Red Bulls), Jonathan Spector (Birmingham City)
MIDFIELDERS (8): Maurice Edu (Rangers), Fabian Johnson (Hoffenheim), Sacha Kljestan (Anderlecht), Jeff Larentowicz (Colorado Rapids), Chris Pontius (D.C. United), Robbie Rogers (Columbus Crew), Brek Shea (FC Dallas), Jose Torres (Pachuca)
FORWARDS (4): Juan Agudelo (New York Red Bulls), Jozy Altidore (AZ Alkmaar), Teal Bunbury (Sporting Kansas City), Landon Donovan (Los Angeles Galaxy)