The Dallas Cowboys’ regular season is for real now. Saturday was the cutdown to 53, and the regular season roster has been set. Of course, there is exactly zero chance that this is the exact same group that will be available when the New York Giants come to town to kick things off. Churn is real for Dallas and all of the other 31 franchises. Some of that is due to last minute contract negotiations and trades, to the rules involving injured reserve, the fact that hundreds of players just were waived or released, and the simple reality that the team can have second thoughts about a player or two.