The best fantasy defense isn't necessarily the best defense as far as giving up points. Bend-but-don't break defenses don't tend to rack up the points.
It is the defenses with turnover and sack potential that give you the best chance of claiming your fantasy crown.
Here are a few defenses worth having this weekend.
Tarvaris Jackson was sacked five times by the San Francisco 49ers last week. That number could double this week as the Steelers look to take out their frustration after the Ravens' loss last week. The Seahawks have a young offensive line that could struggle to cope with Dick LeBeau's blitzes.
Even if Jackson can get the ball out of his hands, Troy Polamalu and the Steelers' secondary will be on the prowl after being dismantled with so much ease last week. Couple that with James Harrison and Lawrence Timmons hitting induced by frustration, and the potential for turnovers is through the roof.
The Kansas City Chiefs offense looks to be in trouble as it tries to overcome the loss of Charlie Weiss. Losing Tony Moeaki and Matt Cassel's early struggles haven't helped. For these reasons, the Lions should have a dominant showing this week.
After struggling to cope with the heat in Tampa, expect Ndamukong Suh and his linemates to be more involved this week. The team as a whole only registered two sacks in Tampa, but taking down Matt Cassel is a much easier task than taking down Josh Freeman.
New York Jets
With Luke McCown facing off against the New York Jets secondary, the chances of him throwing an interception or two are pretty high. McCown is not an experienced quarterback despite being in the league so long; therefore, he could really struggle to diagnose the Jets' blitzes.
Neither Mike Thomas nor Jason Hill are better matchups with their respective cover men. Therefore, McCown will need to be very accurate or the Jets' defense could outscore the Jaguars offense.
Rob Ryan's impact on the Cowboys defense was notable, even during the first week of the season. The secondary was decimated by injuries, but still had a respectable showing in New York. Facing off against the San Francisco 49ers and Alex Smith shouldn't be a problem for them.
DeMarcus Ware will be a big reason that this defense has one of the best performances of the week on Sunday. Ware will be deployed all over the field and should spend more time in the backfield than he does anywhere else.