When asked by the media why Patriots players had different numbers each day of practice, and that don't correspond to the ranges typically associated with positions, Belichick responded, "We don't assign permanent numbers to anyone who hasn't made the team. We are just starting practice for this season, so no one has made the team yet, nor have positional assignments been made. Therefore, numbers are assigned each day based on arrival time at the practice facility, to encourage early arrival. The number roster is made available to all observers each day as practice begins."
When asked a follow up about how it will help the team, Belichick answered, "Nobody wants to be #99."