Below is the UFF numbering chart and also the numbers that are still available. Please check the roster and if you do not have a number next to your name instant message me the number you would like. I will do my best to get you the number you want. 

1-9 Quarterbacks and Kickers
10-19 Quarterbacks, Receivers, Tight Ends, and Kickers
20-49 Running Backs and Defensive Backs
50-59 Centers and Linebackers
60-79 Defensive Linemen and Offensive Linemen
80-89 Receivers and Tight Ends (or 40-49 if those ranges are taken)
90-99 Defensive Linemen and Linebackers