Forms a strong physical presence for the US at the back, has been able to hone his defensive strengths over the past few seasons having played first for Aalborg and then FC Mityjlland in the Danish top flight.

Apart from having represented the US at all levels of youth football, Califf has been with the national team for seven years having made his debut back in 2002. Given the lack of experience in the American back line and the fact that the US could do with his strength in the back he could find himself in the starting line up at the Confederations Cup.