The men play their under 23 team in the Olympics, I think a few spots are open to older players who are on their way out of international soccer. There's speculation that this will be the direction the US goes in basketball after this Olympic team. The rules are: any U-23 player selected must be released by their club - a maximum of three players may be over 23, but their clubs are under no obligation to release them. Why do they have these rules for soccer?