Teams are only allowed to dress 45 players on game day but they're also allowed to dress an "emergency QB". Usually this extra player is the 3rd string QB. One of the interesting options available to us since we don't have a 3rd stringer on the roster is that we could make Cassell the "46th" player and dress another position player instead. Cassell would then only play if something "serious" happened to Brady. I say serious b/c it is my understanding that if the emergency QB enters the game before the 4th quarter, the other QB's become ineligible. Therefore, if Brady just needed a breather for a play or two, we'd need somebody like Troy Brown to come into the game and hand if off. I wonder if Belichick will consider doing this.