With three weeks of the NFL season now wrapped up, it is time to focus our attention on Week 4 and determine what defenses are best to play.It was an unexpected week in terms of my Week 3 D/ST rankings, as two of our top-five ranked defenses performed awfully and ranked in the bottom five instead. The most surprising one was the number-one-ranked defense, the Dallas Cowboys, getting shredded by Joshua Dobbs and the Cardinals. Outliers such as this one have to be expected and should not change ...