4 big reasons the Steelers defense is so good now

Why has the Steelers defense improved so much this season?

Those outside linebackers

(AP Photo/Gene J. Puskar)

Wow, the emergence of Bud Dupree has not only been great for him but you can see how it has freed up T.J. Watt on the other side. They are the best tandem in the league with a combined 22 sacks. Their ability to consistently beat their man gives the Steelers so much more flexibility in terms of coverage behind them.