Rusin's 24. I think he has the potential to develop into a USMNT-quality player in the next couple years, and calling him up for some meaningless friendlies might be a useful part of making that happen. The fact that I don't think he's currently one of America's best 18 doesn't mean he never will be.
Here's a nice interview of Brad: http://www.mlsreserves.com/2011/08/brad-rusin-from-nasl-to-danish.html