Players are identified while playing in two ways:
 1.) by their back tag number
 2.) by the color back tag they're wearing.  
 
 G = Green (go) are athletes in Grade 12 - 13 in the United States and Canada
 Y = Yellow (caution) are athletes in Grade 11 in the United States and Canada
 R = Red (stop) are athletes in Grade 9 or 10 in the United States and Canada