Claire and Grace Walker's team, Hurricane Futball Club 92 Shubert, has been participating this year in the inaugural USYS National League, made up of the eight teams from across the country who were the regional champions and finalists from each of the four USYS regions.   HFC 92 Shubert was the 2007 U15 Region III finalist.   Claire, a midfielder, and Grace, a defender, have played in National League competition in Raleigh, NC and Orlando, FL, and will play their final two NL games in Dallas on April 4-5.