Heath Pearce and Jonathan Spector are to join the team while Eddie Lewis has been dropped.
Nine US-based players were the first to arrive in South Africa on Monday. They were followed by Michael Bradley, Maurice Edu and Brad Guzan shortly afterwards and with Benny Feilhaber jetting in at 07h00 Bradley will have 13 players for his first training session at Ellis Park.
This will be followed by the players holding a soccer clinic for kids in Soweto.
According to the Stars and Stripes’ website, everyone has reported fit, and so far no radical new haircuts or style changes were reported.