8U does not have tryouts.  Spots are filled using order of registration.  Priority is given to 8U (2nd graders).  There are 48 spots (4 teams of 12) and the first 48 8U players (2nd graders) are placed on teams.  If less then 48 2nd graders register then the spots will be filled with 7U (1st graders in the order they registered).