U.S. prospects blog: Foreign-based youngsters to watch versus Colombia

MIAMI -- While almost half of the U.S. under-23 roster for Friday's Olympic qualifying match in Colombia and the return leg in Frisco, Texas, on March 29 (9:30 p.m. ET, ESPN2/WatchESPN) participated in the senior team's monthlong January/February camp, the fact remains that the majority of Andi Herzog's 23-man squad did not.